Are Dungeon Defenders saves cross-platform

I'm upgrading now, since it's a lot of fun. The limits (as seen by me) are:

1. Max 5000 mana.
2. Max Level 10 characters.
3. You can only play the Apprentice and the Squire.
4. You only get 2 dungeons (the one you start in, and a challenge map).
5. Only 10 pages in your item box (this could be for the retail game too, not sure).
6. You cannot do the Ladder online play, only the normal one.

That's all I noticed as limitations.

Items that are left on the ground are sold for their mana cost and split between the number of players. The same goes for mana that is not picked up.

Source: http://dungeondefenders.wikia.com/wiki/Mana

Items left on the ground at the start of a wave get turned into mana and split between the players.

If you lose the level you don't get the mana that is on the ground, it's lost because you lost the round.