These are the differences between Dexter's original 1.3 and the Cincinnati Bell release:
/system/app/Browser.apk differs (not sure what's different yet)
/system/media/bootanimation.zip differs (Cincinnati Bell logo on white)
They're different. Cincinnati Bell's is actually longer (1313 lines) vs Dexter's (960 lines). There may be two lines of garbage at the end of CBW's, but I don't think it's a problem because the XML is properly closed before that.
diff CincinnatiBellFroyo/system/build.prop Dexter13/system/build.prop
< ro.build.display.id=ULTIMOBILE 2.2.1
> ro.build.display.id=Dexter's Milestone2.2.1 XT720 remake
Cincinnati Bell reduced the heap size from 32m to 28m, which is interesting because we've usually gone the other direction in our ROMs and this could affect free RAM. Worth experimenting with. The other change is to turn on data roaming by default (Cincinnati Bell customers have nation-wide roaming, I think)
Renamed and resigned (Android test key, I think, not sure) in CBW version:
/system/app/superuser.apk => /system/app/su-signed.apk
I've extracted the apk's and compared them, only the signatures differ. I don't understand enough about how signatures work to know whether that matters.
In Dexter's 1.3, but missing in CBW version:
Deleting OpenRecovery.apk is a best-practice on our 2.2 ROMs anyway since it seems to like to hang around as a service eating a lot of RAM. Good riddance.