Both uniden's will do fine. I'm not familiar with the 197, but if it works with the digital talk groups on the current system, then it should be fine on the new one.
The new system is supposed to be p25 phase 1 for a while with the possibility of moving to p25 phase 2 sometime in the future. If/when that ever happens, you will need a different scanner.
Also, do not confuse the phase 1/2 above with the system upgrade schedule (phase 1,2,3....).
Jeff.