It will likely reduce muzzle rise to some degree and theoretically allow for slightly faster follow up shots. To what degree is subjective. I've seen reviews comparing the regular and PC versions stating the reduced muzzled rise is minimal or hardly perceivable. Others coming to the opposite conclusion.
And remember that the reduced muzzle rise from porting does comes at the cost of less bullet velocity and therefore less energy being transferred into the target, which to me is not a very good trade off, especially in a 9mm.
There is also the possibility for powder residue and debris to be ejected through the ports. This isn't a concern at all at the range, but could be a potential issue in some type of close-quarter defense situation where you must fire from some type of retention position. I've seen a couple of videos of people firing the PC shield from a very upright posture/low hold retention stance at the range(and of course wearing safety glasses) and then declare that there are absolutely no concerns, but I've seen reports from way too many well respected, high profile defensive shooting instructors who have witnessed problems firsthand when conducting close-quarter shooting drills with ported guns to dismiss it. They subsequently all recommend against a ported handgun for defensive purposes. Plus, if you have ever participated in or even just watched a close-quarter force-on-force class, you'll see some very odd shooting position employed and the same applies to actual defense situations.
The trigger is considered by most to be "better" on the PC version, but these are concealable close-quarter defense pistols rather than target guns and the regular version is more than adequate for that task. The regular trigger might actually be better since I believe it is slightly heavier which is preferred on defensive weapons IMO.
A far as the sights, the vast majority(90+ %) of civilian defense shootings take place at very close distances. Most inside 3-5 yards. At those ranges, those "upgraded" sights won't likely be of any advantage since you should probably be utilizing theat focused shooting at those ranges.
If this is intended to be a concealed carry/self-defense pistol, my recommendation would be to stick with the standard model.