It's hard for me to say how the 10mm recoil is compared to a .40. I mostly shoot 9mm, and when I'm shooting my EAA 10mm, I'll alternate between shooting that and my Glock 17.
I shot the EAA 10mm a couple of weeks ago. I was shooting factory jacketed target loads (can't remember mfg off top of my head). Recoil was not at all objectionable - felt recoil really wasn't much more than that of my Glock 17. Targets were placed at about 75 feet. It is a very accurate gun, and very easy to keep on target, even when rappid firing. I was far more accurate with the EAA 10mm than with my Glock 17. For some reason, I've just never been very accurate with my Glock beyond about 30 - 50 feet - probably just too light.
The report from the 10mm was very loud. I forgot to slip my shooting muffs over my ears before the 1st shot and I'd have a problem shooting that gun with no hearing protection - which was a bit of a concern, since I was thinking of using it for home protection.
I'd say that felt recoil was about the same as shooting .45 from a good full sized 1911.