"Full thrust" is a misleading term, as it may cause one to suppose it means whatever power a full thrust lever setting can deliver. Instead it is better read to mean the maximum power setting under a given set of conditions...which will nearly always be substantially less than the maximum temperatures, EPR's, EGT's, TiT's, ITT's, N1's or RPM's that the engine can actually deliver.
For most turbine engines, 90% N1 or RPM is closer to the max limit under a set of conditions, and closer to the most efficient operating range for that engine. That, of course, is very "ballpark," and not at all specific to a given type.