A SAA 744 (RB211's for this bird) has the EGT display on the EICAS where the KLM 744 (CF6) has only the N1 and EGT on the upper EICAS.
Photo © Julian Whitelaw
Photo © Timon Kruisman
The same appears to be true on the 777. UA 777 with the Pratts, and a Lauda with the GE90:
Photo © Kyle Stephens
Photo © Manuel bialonczyk
However, the 757 looks like the RB's and the Pratts have the same:
Photo © Chris Coduto
Photo © Bevin Shively
The 767's have the differences like the 777 and 744 with some missing the EPR between the CF6, RB, Pratt 4060 and JT9D.
Is this simply the airline's choice of display, such as how some have the round style instruments on the 737 Ng's instead of the tape style such as WN and CO, or how some airlines opt for the V Bar FD over the crosshair, or do the engines differ in a way that some do not have an EPR calculation? Would someone care to explain?