When I chose Lifeline, it was because I fear not to discharge it 100% on rare occasions.
Any other group size battery DOWN HERE would weld itself to the hood when it was closed and if the group 42 is substituted it will eat a hole in the radiator end tank and without a hold down guaranteed will bounce and weld itself to the hood. With luck the radiator leak would put out the fire.
"Penny-Wise and Pound-Foolish" has been around for centuries. I am far too cheap to automatically rely on a warehouse cheap-at-any-cost battery. OK here's a question: What is the thickness of the positive plates of those batteries? Plates per cell? Price on the other hand is no guarantee of high quality either. Warranty survival percentage is an indicator.
A vast majority of RV'ers haven't a clue as to how to go about taking proper care of an RV battery. They buy, they use for a while and to the recycler they go. It may be implied that these folks "Don't Care To Learn" and thus the subject of learning anything but batting averages and whom is starring in what movie, is of little importance to them. That assumption vanishes when you listen to them moan and complain to everyone who wants to (or doesn't want to) listen to oaths and expletives.
I have learned to carefully step around such an attitude...