The wii Xenoblade is more linear. Not open world, but there is a big world to explore, and the overall quality of the story is a little bit better. The combat is simpler, as X has many more ability slots, and the mech too. The wii one is much more challenging, because its much more difficult to run past threatening enemies. some levels in X i just snuck through. (Maybe thats why i am not strong enough to beat the final boss..) I personally like X less because the open world makes it feel like less work was put into the world, partially because later you just zoom past it all in your mech. The laziness is more evident in regions other than the first. I have heard that the end of X references wii, but I haven’t beat either, so I cannot confirm.