The Sprites are enlarged only in Sprite Creator. When you save the sprite sheet each tile is 32x48 and the Animated sheet is 128x196 and are still saved as the default size they were originally intended. The images in Sprite Creator are enlarged by 2 times for better viewing on the newer 1080p screens. Back when Sprite Creator was first created screen sizes were not 1080p yet. Due to the size of the images it became difficult to see the individual parts especially if they were some of the smaller parts.
The XP Sprites were created by Mack. I think they were designed for Game Maker. Can you send me the rtp animated png to jensen_305@yahoo.com I would like to get a comparison sprite and see if they are different sprite types. Are those rts sprites RPG Maker "Tall" sprites? If so, they are different base and items than the XP sprites in Sprite Creator.