Can't speak for every gen of glocks, but i prefer gen 3's. Single recoil spring. And there are a great many parts available, oem, as well as aftermarket. Gen 3's used a 17 lb recoil spring for both 45acp and 10mm. There are many options for recoil spring weight.
As example, 45acp firing standard loads, the oem spring is fine. But if you use +p loads, which most leo loads are, like Hornady critical duty, 18 to 20 lb recoil springs will help service life, as well as felt recoil.
10mm common factory loads are actually under powered, closer to what 40 cal does. If using full powered 10mm loads, 20 to 22 lbs is advised. These are on full/normal sized glocks with 4.6 inch barrels.
Knowing this, and the options available with glocks, weight of slide is not as critical as maybe with some other firearms. Dirt and grit having the opportunity to get inside, if vents are cut clear through slide walls would bother me more for everyday carry. Everyday carry weapons tend to collect dust and dirt around barrel opening as it is.
Gen 4's use a two piece recoil spring, not sure all the options available, but they have been around long enough that im sure they are there.
Plus, keep in mind, even like 9mm, glocks are built for reliability. They are kind of like ak's, ugly but reliable, through a whole lot of variables. In 9mm, you can use garbage under powered ammo, or p+p's and it will still work. Slight weight in slide or recoil springs is just fine tuning really. The real answer will come on the range, put 200 rounds through it, any malfunctions, probably not, if so what type, and so on. You'll know by firing and feel, plus during cleaning and inspection if its hammering too hard, to light, whatever.