These are the key factors for MAS management decision making team to consider when come to engine purchasing:
1. The reliability of the engines (statistic wise).
2. The cost of maintenance per hour of those engines.
3. The best operational support from at least taken from 3 engine manufacturer.
4. The rotating spares in the region of operation
5. The most important is, forget all of the above and find the manufacturer giving the best commision for your own pocket.
It works all the time.