N1, Torque, TOT
Here at higher altitudes (8,445 FT MSL, MMTO) power is measured different ways, on the 212 for example on some days you will reach the N1 limit before you reach Torque or ITT (temp.) limits, then others ITT will be your limit and torque will almost never be a limitation becasue it will never be reached before the other limits, consequently your measure of power available changes.
Just this morning I took off with 2 pax and 70 Galons on a 206B3 and my limitation was torque, I could go to 100% TQ and I didnīt worry about TOT (temp.), then the same flight at noon with 10 degrees more and I couldnīt reach 80% TQ before reaching the TOT (temp.) redline.
All of this is basically due to the high elevation, if you take both helicopters to sea level your basic power available indication will certainly be TORQUE.