As time went on, the community moved toward (Super Famicom) files. These were "raw" dumps—pure, unadulterated copies of the game data without that extra 512-byte "hat" left by the old copier machines. The Quest for Compatibility
If you want, I can:
Since the difference is just a small block of data at the start of the file, you can convert them using several methods: 1. Use a Dedicated Conversion Tool smc to sfc converter