How big a difference, in felt recoil is there between factory ported glocks and the standard models?

I have a standard glock 19 for duty use, and a glock 26 for off duty carry. I am thinking about getting another 19 for home defense (the wife loves my 19 duty gun). Night sights and a light are a must, but how big a difference does the factory porting really make? Does the porting drastically change felt recoil, or does the added cost out weigh the overall gain? I usually have my 26 and 19 loaded with speer gold dot 147+p hp's. In the little glocks, the speers really pack a bang. The recoil has never really been an issue for me. But if the porting makes a MAJOR difference, it may be worth the money for my wife's gun. Do the porting holes open up the slide innards to a major dirt fest? I have never even held a ported glock, that's what all the questions are about. Thanks for any feedback!How big a difference, in felt recoil is there between factory ported glocks and the standard models?
There were a few guys in the academy that had compensated Glock 23's. They definitely reduce felt recoil, but you get the big jets of fire that shoot out the top. It's pretty crummy for night vision retention. We had to wear our caps and shooting glasses at the range, and they made us shoot in all different positions, like the high tuck and with the pistol tucked into our guts. When the guys with the comped Glocks shot from the gut position, it blew their caps off because of the ports.How big a difference, in felt recoil is there between factory ported glocks and the standard models?
Besides the issues Brian C. mentioned, the ports also let a lot fouling to build up on the front sight and the slide itself. It's not a huge deal but if you are investing in night sights, you'll be cleaning the front blade a lot just to see the dot.