Well it took me 3 hours to finish one mission on mgsv..you'll need a lot of time to sink into this game because the "prologue" is so annoying but once you're actually free it's fun. Witcher, you're just free right out the gate after a tutorial mission which is 10 minutes long. Combat is great if you actually learn what to do. Leveling up is a bitch but it's rewarding as all hell. Id go with Witcher but you can't really lose in this situation