the only resriticion is cosmetic stuff pretty much, and less space to hold weapons
other than that it's pretty much the same
Free:
Backpack 50 slots
Items: Standard
Crafting: Limited blueprints
Trading: Receive items only
Gifting: Can receive gifts
Premium
Backpack: 300 slots (expandable up to 1000)
Items: Standard, Rare and Cosmetic
Crafting: All blueprints
Trading: Full trading
Gifting: Can give and receive gifts