Personally, my assumptions on FO4/Bethesda are based on FO3 & Skyrim, and Wastelands 2/ InXileObsidian on FO1/2 & FONV. It's clear already on the limited info out there that these are going to be two very different styles of RPG. I've enjoyed all the above but having just played through FO1 & 2 recently for the first time I got to say that I think I'd pick Wastelands if I had to choose.