ECM: SocGen vs Ca Cib



I had an offer from both banks in the ECM department (in Paris).
I know that the situation is not good for both of them however I have to decide.
I never worked in these two banks and I would like to know which is more regarded or has more potential in ECM
(ECM is a cyclical business and so I would like to choose the safer one for the future)
Any advise is appreciated.

Thank you!