Save file compatibility issue, Mega Man The Wily Wars

[sax-bit]

I dumped my Genesis Mini ROMs a while back, and one of those ROMs was Mega Man The Wily Wars. I played through all of Mega Man 1 (on the Pocket), and it generated a save file. Today, I dumped the Mega Man The Wily Wars ROM from the limited edition cartridge, and I saved it to my Pocket's micro SD. I wanted to use my save file from the Genesis Mini version (that I had created while playing on the Pocket) while playing the Retro-Bit version of the ROM. I copied my Genesis mini version of the save file to the proper location and renamed it to match the name of the Retro-Bit cart ROM. This seemed like a simple enough task, but for some reason....when I launch the Retro-Bit version of the ROM, it doesn't recognize the Genesis Mini version's save data, even though I renamed the save file correctly and maintained the ".sav" extension.

Is this an issue with the core? Are the Retro-Bit and Genesis Mini versions of the ROM simply not compatible in terms of save data? Am I simply doing something wrong? Or is it something else?

Thanks in advance.