Just for your info FA-50 price is same as JF-17 Block II around USD30 million. Probably Pakistan backed of due to relations with UK.
But you have to consider not single aircraft cost but total package (i.e. including spares, training, maintenance services etc. It may well be that one or the other gives better value for money in that respect.).
And this is coupled to operational costs (over the lifetime) > an engine like RD-33 or the derivative used in JF-17 may well require more maintenance (fewer hours between service) and may be more expensive for that reason (reliability). Or one or the other engine may consume more fuel (efficiency).
So it is not that simple a comparison.
REPOST FROM:
https://defenseissues.wordpress.com/2014/12/06/fighter-aircraft-engine-comparision/
Mechanical reliability and maintainability
Mechanical reliability depends in part on
mechanical complexity. While most engines use the same basic architecture, there are things they very clearly differ in.
EJ200 has 8 compressor and 2 turbine stages
M88 has 9 compressor and 2 turbine stages
RM-12 has 10 compressor and 2 turbine stages
F-135 has 9 compressor and 3 turbine stages
F-119 has 9 compressor and 2 turbine stages
F404-GE-402 has 10 compressor and 2 turbine stages
F414-400 has 10 compressor and 2 turbine stages
AL-31F has 13 compressor and 2 turbine stages
AL-41F has 13 compressor and 2 turbine stages
While this is a vast oversimplification, going by number of stages alone, EJ200 would be the most reliable and easiest to maintan, while AL-31 would be the least reliable. EJ200 also has the fewest 1st stage fan blades of any modern fighter aircraft engine. F-119 has an additional failure point in form of the thrust vectoring nozzle, and the F-135 variant used on the F-35B has two additional failure points – TVC nozzle and a lift fan, plus a third failure point in form of doors for the lift fan which techically are not part of the engine. In the F-135s case, several weight reduction measures also made it far more vulnerable to the combat damage.
Many of these engines also use
modular design to simplify maintenance. Number of modules is as follows:
EJ200: 15
M88: 21
RM-12: 6
F-135: 5
F-119: 4
F404-GE-402: 6
F-414-400: 6
As it can be seen, M88 and EJ200 would be easiest to maintain, especially the M88.
Service life is as follows:
EJ200: 6.000 h
M88: ??
RM-12: 4.000 h
F-135: 2.000 h
F119: 6.000 h (?)
F404-GE-402: 4.000 h
F414-400: 6.000 h
AL-31F: 1.500 h
AL-41F: 4.000 h
Overall, EJ200 is the most user-friendly engine.