To the OP. For the most part the only bit of information so far on here that is correct is that the Tundra and a 3500 RAM are not the same truck. The RAM will have higher ratings for towing and payload but will have a much harsher ride when not towing or hauling weight in the box.
The Tundra is not a flimsy grocery getter as some have said here, probably due to their ignorance. The Tundra is a very stable, capable truck when used within it's ratings. It can tow a 30' trailer very well, again as long as it is within the Tundra's ratings. It will be more comfortable as a daily driver as well. It really comes down to the total trailer weight and hitch weight of the trailer.
I have towed my 32' trailer for well over 15,000 miles with my Tundra and never had an issue. The Tundra handles the trailer very well for stopping, wind gusts and power. It is also very comfortable to drive each day to work and since I tow 3 - 4 times a year it is the perfect tow vehicle for me.
Don't let some people who probably have never even sat in a Tundra let alone drive or tow with one turn you off on a great potential tow vehicle. It really depends on what your weights are and are they within the ratings of the Tundra or whatever tow vehicle you are looking at.
Interesting comment. You say that some who have provided advice here have probably never towed with or even sat in a Tundra; how many miles towing do you have with a one ton diesel Ram as comparison? The OP is asking for advice between two specific trucks and almost all have given the thumbs up to the Ram for towing. Also, it appears your three or four times a year annual towing experience is minimal unless you tow hundreds or thousands of miles each time. Since we have no idea what kind of towing the OP is looking at it is sort of hard to make a comparison; but absent that information I have never read on any RV forum that somebody was sorry they purchased too much truck for towing their RV. But, pleny of times they stated they needed more truck. I suspect that if you towed your trailer with a diesel Ram 3500 you would never look back; many have come to that conclusion.