Yeah, the Marie Rose gatcha increases the chances of both Marie Rose's new SSR and Ayane's SSR to a 0.28% chance (up from the normal swimsuit gatcha of 0.1% chance), effectively giving you almost 3x the chance of winning either of those. Of course, I spent my hard earned 5000 vpoints on it to get Honoka's uniform SR as my highest reward....
Update from what i've seen:
Apple: +20xp
Creampuff: +250xp
Donut: +20xp
French Fries: +5xp
Grape: +5xp
Lemon Drink: +125xp
Marron Glaces (Ayane 100 presents): +500xp, +500 V-points
Manju (Nyotengu 100 presents): +500xp
Melon: +20xp
Peaches: +5xp
Pineapple: +20xp
Sushi: +20xp
Tea Set: +125xp
Watermelon: +20xp