There is one major difference between the Verizon sold Motorola DROID BIONIC and the AT&T bound Motorola Edison. The former has support for Verizon's 4G LTE network while the latter showed no sign of being enabled for LTE in the FCC report. That is not surprising since the carrier only has 5 markets that currently support LTE as we reported. So, any 4G connectivity will be done over the carrier's HSPA+ pipeline.
source: FCC, Ameba (translate) via DroidLife