Loc Green:
757 and 767 are the same.
Climb 2 will give you 88% of full climb thrust
Climb 1 will give you 94% of full climb thrust
Our SOP is to derate to Climb2. When the ROC decreses to 1500 fpm (notwithstanding acceleration), go to Climb1, and the same again for the change to full climb power.
If you have a particularly high take off derate you might not be able to set it without derating the climb. i.e. it stops you setting a take off derate that would work out as a lower take off thrust than the current climb thrust set.
Some people dont like using climb 2 if they've done a full power take off (for e.g. engineering request), as it is such a large power decrease 'it scares the pax' !!