As you can observe in the plugins interfaces, they are very similar. The SFC-5 uses tactile switches + LEDs combinations and the SFC-1 uses slide switches. Most of the usual synth controls have the same layout. The main differences are in the modulation section. It’s up to the user to come up with strategies and workarounds. The user buttons and knobs are there to offer extra possibilities. The SFC-1 also has an extra sequencer/arp section as well as the FX section.