The Bitit Gift Card is an awesome tool to make discover bitcoin to family and friends in a snap.
There is no difference between the Bitit online code and the Bitit gift card. The supports are different (by email or physical), but the features are the same.
Bitit prepaid solutions are denominated in euros. The stored funds can be redeemed in Bitcoins on the Bitit platform. In this way, Bitit maintains the exact value of the Bitit code until you decide to redeem it into Bitcoins.