I think XP and VX uses the same tilesets if I remember right, so yes, they're compatible and easy to use!
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I just checked, they are not compatible sadly. XP uses 32x32 sprites but with an extra animation. There are converters that can convert the sprites from VX and to XP and they work fine after I did that. But the tilesets are another story. XP uses one sheet for an entire tileset, no more than 256 wide. The only way I could get it to work, was to use another converter I found that runs inside MV and converts the MV tilesets into XP. It pops out one sheet and it does work, but sadly the auto tiles don't work. No water at all.