Yes, but I think that the silver and wide screen versions of Fire (and also Manhole) almost can be described as different games or versions. There are other differences with the lcd segments and the early versions has no alarm functionality but that exists on the later versions.
The crystal screen and new wide screen versions of Climber, SMB and Balloon Fight are on the other hand most likely identical ROM wise. This still needs to be confirmed though.
Egg (and also Mickey Mouse) still needs to be confirmed. The current ROM has been dumped from a Soviet clone (Nu Pogodi). Mr. Do has borrowed me Mickey Mouse and I'll dump it once I have time.
