Neither of them but if I have to pick one, fallout 4 looks more to my taste.

Fallout 4 without question.Was going to get a wii u for xenoblade but after seeing more gameplay,it looks boring as fuck excluding the mechs.

Honestly.... Im finding Fallout 4 to be a bit boring. I suspect I might have enjoyed XCX a bit more. Though in hindsight, I wouldn't have bought Fallout 4 and Im not interested enough in XCX to buy it either.

Well I have Fallout 4 and it is fantastic and have yet to even look into Xenoblade...so there you go. No contest for me.

Well, I have a problem with Bethesda games. They're awfully boring for me, and they're too bugged for my taste. I've played Skyrim 4 hours and I encountered like... 10 bugs? 1 NPC just walk away from me and went through a solid wall to never came back. One dragon get stuck in my way so I couldn't advance. The horses which were carrying my transport just started to fly.... It was a painful experience. Oblivion was less bugged, but, combat system is boring as fuck, the world isn't very beautiful and visually attractive to travel through it, the story is meh at best... I'm not saying they're bad, I guess they might be good since everyone seems to love them. But they're definitely not my taste. I must admit though that I never played a Fallout game, so maybe I'd like them more, I don't know. 

Oh, and I bloody hate the "weight" system. I know it's more realistic, but having to throw some items every 15 minutes because I have too much weight is fucking tiresome. I don't mind realistic, I want fun, that's it. 

XCX is somewhat more in my area of interest, though it is a close call with FO4 apparently having a significantly better third person perspective than previous FO entries.

I dont need to choose I have both, Now I need to find time from somewhere to play them (damn demanding job).

That's like asking if I'd rather eat or sleep.

i play jrpgs most of the time and i dont like bethesda´s games but xenoblade looks extremely boring to me... Good thing a dont have to play any of those (=

XCX because I LOVE the first Xenoblade and the new one seems to have an amazing world like the first one (but I've read that it has a worse story)