In my experience, no. That said, I DID run the .bin file with all my batteries so the FW versions would be consistent. This was just because I'm OCD, not because there were any performance issues. That said, maybe I didn't have any performance issues because I DID match the FW versions. That said, I DID fly with "mix-n-match" battery FW versions, but for not very long. Maybe "better safe than sorry" applies here.
I DID have a buddy crash his Inspire 1 due to catastrophic battery failure mid flight. The battery and Inspire were completely destroyed, so I couldn't conduct any forensics on the battery.