The SS4 has a nicer look to me. Even between the INFIcoot and SS4 I would rather have the SS4. The interface between the mudder grip and the blade has a more swept design that looks streamlined vs. the Res-C on the coots which is more blocky. For me its like the difference between a Browning High Power or CZ 75b SA and the glock and HK USP (especially the Cs). All of them are great guns but the Browning and CZ easily win for aesthetics.