KBPsen
All the RR engines, RB211, Trent 700,800,900 and 1000 are combined scavenge temperatures. So are the PW4000, CF6-50, CF6-80C2 and the GP7000. The two I am not sure of would be the GE90 and GEnx. These two engines, particularly the GE90, may have a different measuring location, not sure.
The point is that the three spool engines generally run a higher oil temperature compared to two spool engines. But, none of the reported temperatures may relate to the highest temperature experienced (the hottest bearing sump) although I think the engine manufacturers know the relationship.