Which Masters program?

[Zentachi]

hello everyone
I have a Bachelors degree on "Mathematics", more specific on "applied mathematics specialized on computational mathematics" from the National University of Athens.
I have enrolled in a Masters program at the Athens university of economics and business to obtain a Master degree on "Applied Economics and Finance".

I am planning to apply for the Master program of Quantitative finance at ETH and UZH in Zurich and for the Financial Engineering at EPFL.
The one I prefer to be accepted is that of Quantitative finance.

I am afraid, I might not be selected though as my bachelor marks aren't that good. Anyone have any experience of how strict the selection is?

Could you suggest me an alternative similar Master program that I could apply in case I won't be selected in the two above?

thanks
Konstantinos