UCD9090-Q1: Difference compared to non-Q100 version UCD9090

Team,

my customer designed with UCD9090-Q1. They need samples for prototypes, but we only sample the non-Q100 version UCD9090.

From my understanding, the two versions are functional identical. 
Can you confirm this?
Do you see any issue with using the non-Q100 version for prototypes?

Thanks!