Upgrading to AvMap EPK V

[K-man]

I just got an email from AvMap offering to trade the EKP IV for the EPK V for 150 Euros. My question is, has anyone changed from the IV to the V? Does it fit the same cutout (the unit is smaller but there is a cradle available), is the remote aerial connection the same, can we transfer existing data and how similar is the operation?