I am one of the biggest Xenoblade Chronicles fans outhere ( the wii game). I had very high expectations for it when I first bought it, and it simply exceeded them all. The characters, the world, the music, the artstyle, everything was simply jaw dropping. As a norma JRPG the game was also very good, but the main story was far more engaging. I found myself mostly skipping all side quests 70% through the game just to get to the ending of this epic tale.
However, with Xenoblade Chronicles X it wasnt like that. Most people think that the story is about Team Elma exploring new areas and defeating indigins. Well, in a way it is, but thats far from what I got out of the story. I didnt care about that much about the main story, although it was actually good with like 2 good plot twists, but of course Xenoblade Chronicles's is way better. The story of XCX is about humanity's survival. Everyone of them has lost everything. Almost everyone they ever knew didnt make it on the White Whale; nevertheless, they chose to survive. They didnt give up hope despite the constant threarts they face. Each side quest told a very interesting story about a civilain trying to survive in all of this. I had that idea in my head all along, so I found the game's story/world more compeling.
P.S: I still like XC more of course, fantasy over sci-fi all the way, but both of them have very interesting world and characters nonetheless. This goes without saying to but XCX exceeds XC in terms of exploration and definitely gameplay.
IMSM