Chain ring replacement. 9 speed vs 10 speed?

Chronowc

Hi

I damaged my chain ring last year and looking to replace it. I currently have an FSA 110 BSD 50 S9.

Most of the chain rings from FSA seem to be for 10 speed but look exactly the same. Just say N10 instead of S9.

Is there any issue with it? Or will I have to specifically get the same S9 chain ring to make sure it runs the same?

Thanks in advance!

ugo.santalucia

same thing