Barit1, thanks for that insight. Very usefull.
Still, imho you come to the wrong conclusion. Because it IS the same, and it doesn't damage your engine (too much), you shouldn't use MCT or even TOGA.
We as pilots are not only liable towards the bean counters and the ATC, but to our procedures. Under chapter limitations you have a limited time of TOGA. MCT is per definition the maximum thrust setting you are continously allowed to. So if you go over the limitations, you act against the rules and can be sued.
And it doesn't show good airmanship if you use all your reserves just to satisfy ATCs requirements or your ego in case you want to outclimb someone else. Reserves are there to be kept until you really really need them. No ATC controller will thank you if you get into trouble and you tell him "I just wanted to help you".
Dani