As I understand, the GE90 was a complete redesign but did is it fundamentally a pretty similar power plant?
Fundamentally very similar, both have a fan, compressor, combustor, HP turbine and LP turbine. Except one was designed in the early 1980s and the other in the early 1990s. One sports somewhere around 50,000lbs of thrust the other 85,000lbs of thrust. I think you will find the same with the RB-211 and the Trent engine series...