WIFI only:
it has a different (slower processor)
It has a slower graphic unit (significant latencies)
the Bluetooth module is only 2.1 and keyboards, mice etc not go 100%.
video calling over the Internet is virtually impossible
Therefore, I would rather buy from today's perspective, the 3G. WIFI was verhundst from my perspective of Samsung. it's just cheaper and inferior hardware than the 3G
My review applies to the WIFI only and Amazon should the equipment on offer (and review) separate, because technically these are two worlds.
Who wants to have a similar device is the WIFI only with the ARCHOS 7 home tablet for 100 euros as well served and has saved money.