Remoteness and Scenery -
I would certainly favor the Dempster Hwy. route on these two categories although I only travelled the first 200km's of this road in 2006, and if it weren't for my passenger side cab mount rusting out that stressed out my steering box-shaft on my rig I would have not turned around and made the entire route (which of course would fix itself after 20 miles down the road).
The remoteness tends to give much more of that "middle of nowhere feeling" on the Dempster in comparison to the Dalton upon two main reasons :
1- the more increased infrequent traffic that the Dalton has.
2- the more infrequent infrastructure and established base camps you see along the way on the Dalton.
Once arriving at Tombstone Mtn. Campground at mile 44 and northward - the scenery changes dramatically like every 10 to 15 miles for the next 70 miles that I know of at my turnaround point, in which blew my mind upon how underestimated the scenic aspect of this road really is just in this stretch alone.....and from the other pictures and images I have seen of this route that were much farther north seems just as interesting.
The most scenic portions of the Dalton Hwy. in my opinion start well north of Coldfoot especially the closer you get towards the Brooks Range and north of it.
Although there are a few highlights of scenic areas in between mile 0 to Coldfoot at mile 175, the majority of scenery along this stretch is still the typical Interior Alaska landscape.
Highway Conditions -
Providing if all the weather related factors and overall maintenance being even, I would still give the nod on the Dalton Hwy. for this category based on the fact of the roadway is partially paved in some stretches (if it is still holding up) and more maintained because of the commercial traffic, however there is always some main reconstruction road project going on at any given area or three during the summer.
In comparison to where the Dempster Hwy. is seal coated in places, seems to do just enough maintenance to keep the road open (as reported at least on the Yukon Territory side) at various troubled spots....as I read a CBC article in 2009 or 2010 of the NWT government threatening to file a lawsuit with the Yukon road maintenance for not emphasizing enough road maintenance on their side of the Dempster as it was depleting tourist dollars with substandard suitable access for road travelling Inuvik residents in their formal complaint....pretty much were reporting the same type of road conditions one would encounter on the east portion of the Campbell Hwy.
Another factor is about a regional section of the Dempster Hwy being exposed to the notorious shale rock that will create havoc to having potential tire troubles (even on commercial tires), where it is quite essential to having onhand extra spare tires when taking on this route, a patch/plug kit with an air compressor I always have onhand anywhere in the roads of the far north in my camper rig.
I always have carried two spare tires onhand on both routes, even during the old Sunday drives I used to take to the Yukon River Bridge.
Now while adding in the factor of a bad rainy season or a period of significant rain developing on either road while you are travelling on it, throw highway conditions out the window because the road conditions on both roads will be equally bad, rough, and fair in various spots.
The best advice I could emphasize for highway conditions on either road is to be flexible and try to time it right upon weather conditions with the least rainy forecasts in the horizon upon travel....and pay more attention to road reports along the Dempster.
Services-
While both road routes are pretty remote to their own, the Dalton has a few more services and fuel stops in between.
The two big advantages if one were to break down and have roadside troubles of the sort, the Dalton is road to be on if comparing the two and that is because of the more resources it has to in order to provide support and keep the oil fields going.
Not only you have the intermittent commercial semi truck traffic of hauling supplies in and out of Prudhoe Bay and various camps and pump stations, you also have a State Trooper Post in Coldfoot with Alyeska pipeline security personnel routine patrolling the road and access to the pipeline so it could be any one of these occupations that could provide emergency assistance if called upon.
Most wreckers will be dispatched out of Fairbanks for broken down rigs to be retrieved, and I would imagine it would be a little cheaper overall but by all means quite expensive versus dispatching some wrecker from Dawson or Inuvik on the Dempster, which was the reason I turned around when I did on my 2006 trip and the fact no immediate resources to rescue me in Canada because of the friends I have that own the haul equipment capable to do so are all inadmissible in Canada anyway so I was pretty much on my own, with only $1500 onhand.
As noted you can only drive to Deadhorse on the Dalton Hwy. and in order to see the ocean and to gain permissible access you have to book a reservation on a tour because of security measures as it is an oil field.
As also noted, the main purpose of the Dalton Hwy is access to and supporting infrastructure to the North Slope Oil as it is all business like and not so called as marketed for the traveler or tourist, as it is now about 20 years or so the public is no longer required a permit to go beyond the old Dietrich Camp Checkpoint at mile 210.
As the purpose of the Dempster Hwy. now is providing road access to Inuvik and villages along the way, which in turn caters a little more to the traveler once you reach those destinations all with limited resources of course.
Note the road sign starting at mile 0 Dempster Hwy :
Both routes are unique to their own and if possible take them both on.....however if recommending upon a choice of only one route to be taken despite weighing in all the factors mentioned above in my opinion......I would definitely recommend the Dempster Hwy. over the Dalton Hwy.
Here are a couple more images of my own pictures :
Aug 2006 - mi 52 Dempster Hwy :
Aug 2006 - mi 77 Dempster Hwy :