Since the BCD996P2 and BCD325P2 are essentially the same architecture, I don't know that either one would be better or worse than the other.
While I haven't looked, I'm sure there are discussions of how these scanners handle P25 LSM in the Uniden forums. The general consensus, I believe, is that the BCD436HP and BCD536HP scanners are the best among the Uniden scanners when it comes to P25 LSM.
BTW, posting a question about one type of scanner in a thread discussing a different type of scanner is known as hijacking. Your post was moved to a different thread so as to avoid hijacking the first thread.