Recently compared my P5C to my 1st gen P99. Approximately, the P99 is 1/2" longer, 1/4" taller, and 2.5oz heavier when fully loaded with 16 rounds to the P5C's 8 rounds. The P99 is actually lighter by about 1/5oz when both are free of magazines. While one might prefer one over the other for personal reasons, it is hard to argue the presence of 16 rounds over 8 in such similar packages. A comparison of P99C to the P5C would be better, as would be regular P5 to P99, but I only have these two to compare. I carry both in the line up, as I do a slightly "cut down " P1, which is now in similar dimensions. Just food for thought.