Same. Of course, I don't know your whoel situation, but having an st165 & 162 would be having 2 similar cars. The again, perhaps that could be a good thing, especially if you're goinf to mod the 165 and have nice left over hand-me-downs for the 162.
Why put a 5sge in? Already have the engine? The same amount of work would give you a nice 3sge, or a bit more for the 3sgte.