800 will be deployed in either 5x5mhz or 3x3mhz configurations depending on local spectrum availability in lieu of other entities holding portions of the block like Solinco or spectrum squatters... In a 5x5 configuration, the speeds will be no different than PCS other than the fact that you will likely get more usable LTE signal than PCS which translates to better speeds than PCS at the same position as LTE is very signal dependent.
In a 3x3mhz configuration, the theoretical max is something like 22 mbps (?).