Okay, something strange is afoot. Check out this comparison I just did in Illustrator. I'm going to switch back to this deck in Tilt and see what happens.
(but you're right, the 2 IS about 1 pt smaller on the bottom...
)
Oh, as for the file size, I think that has to do with the way that I saved the first deck compared to the second. The first was saved in SVG 1.1 or something whereas DGSP was saved as TinySVG 1.2