U30/C30-7 vs U33C vs U36C/C36-7

So It seems it all comes down to reliability not fuel consumption seeing the gph/hp equation. How does reliability stack up today with the C44-9 and the SD70- both have been around for over 10 years(not including SD70ACe or GE’s new EVO) is one more reliabale than the other. I know GE out sells EMD but there are so many older EMD’s out there it would seem EMD might have the edge in reliability. Joe.