ok, in a flyer is appeared another version of the spring poster. I cut it from the PDF and enlarged.
Overall: there isn't much of special, just Cedric slightly distanced from Bella (in the Spring poster, was behind) and the background seems more blurry and with less details.
At least here we can see better Cedric keeping a pile of books on her paws.
BRB just replied me sayng that the intention is to use the spring poster again for the next convention, becouse seems the audience liked it. And I'm not surprised: I find unusual that a cartoon on a toy for little girls has a poster that make think more an adventure in a dungeon in a D&D game.
Yes, Funtasia could be done keeping in mind to appeal a general audience, but using a traditional approach isn't wrong: a large part of the Filly world is cute and colorful, and kids remain the central audience, the rest is an extra.