someone mentioned in the bionic forums that they heard all of the new 4G LTE phones for VZ should have this feature so just keep your fingers crossed they are right.
Actually there is a big difference and its not a just a simple yes or no. First the ThunderBolt is capable of SvDO which allows 1X voice calls while using EVDO Data at the same time, while I am not sure I think the Charge does the same.
The Revolution is the first phone in the US (and possibly elsewhere) than has completed a voice call over LTE. So you do get VoLTE so it can do simultaneous Voice & Data over LTE