Conclusion :

Qualities of NUMECA are obvious, and the fact that it's often not converge reveals a better quality of mathematical schemes than FLUENT which is diffusive (thus more able to converge). EURANUS solver seems to be quicker than FLUENT, but FINE interface is slower.
NUMECA software offers an expert mode which allow to select order of schemes, to put coefficients and so one. This kind of functions will allowed tasks where we will be able to visualize consequences of such changes.
NUMECA as validated this test and reveals able to be use in future MCIP tasks.