Recoil of 40SW from the same CZ75B pistol is probably 20-30% stronger, but the worst thing is the recoil feels much sharper to the point that its gets you tired faster and not as pleasant to shoot any more. Recoil on 45ACP is probably 50% stronger but much longer, softer push. I easy can shoot in one session 200-300 rounds of 9mm or soft target 45ACP and don't feel as beaten up as 100-150 rounds of 40SW regular range factory ammo.
I would add to this that the particular grips and the shooters grip style matter in the 75B. With thin grips and a high hold, my right thumb gets beat up at that 100-160 rounds of warm ammo. With thick grips and a lower hold, the gun is comfortable to shoot for a full range session.
40 is a great round if you load your own, great flexibility, and can be really fun too. The 75B is a great platform for the 40, the SA a bit better, and the 40B even better at making the round fun to shoot (I wish they still made the 40B).
Now... if you are shooting bulk or mid range off the shelf ammo, you might not notice much difference. My local range has +P 9mm and soft 40 as the cheap stuff, so using that, they feel pretty much the same.
I don't load hot hot ammo, but keep my loads pretty close to saami max (no +p 9, plenty of max load 40). Comparing those, that 20-30% seems spot on.