Really depends on what your going to use it for ? I have the 4.5" in bi-tone 9mm and I wish I had the 5.25 as it has all the upgrades I w like. Never understood why they went w 4.5" barrel in the first place.
Try to fire a 3.8 w mag extension before buying. Some have been pinched and find it less than stable While others love, love, love it. The cost of rental & range fees is insurance against buyers remorse.
If 90% of your time is spent at the range, 5.25 is the way to go. I like stainless steel but the SS upgrade vs duracoat finish is probably a wash. Get both & your prepared for anything.