No idea of the first one.For the second one, it is a prestigious program that recruited first batches of students in 2017.
It is a vigorous program with intense coursework, recruiting elite students from all over the world。
Placement of graduates are very good.
Difficult to get high GPA as competition is keen.
Personally think eth and epfl are better, but this one is taught in English, similar program are taught in german or french in the other 2 schools.
https://programmes.polytechnique.edu/en/ingenieur-polytechnicien-program/ingenieur-polytechnicien-program
Engineering program at ecole polytechnique de Paris
I don't know much about this particular programme but just from what's offered, it looks very attractive. Ecole Polytechnique is I think a military school (or under the French Ministry for Armed Forces) though so I think there's a heavish military influence...
I think anyone who graduates from here will have no trouble finding a good job in France... whether that is what your child is looking for is a different matter...