Drop-in replacement for EPCS64SI16N

Hi, 

I am looking for a replacement for the EPCS64SI16N (EOL). The EPCQ64ASI16N seems to be quite similar, but we need to be sure that they are a drop-in replacement and functionally the same. So, the EMS producing for our customer should ideally be able to use the replacement part just the same as the obsolete one. 

The Config Device interfaces with the EP4CE55F23C6N FPGA.

Do you know if that is possible?

Thanks!
Korbinian