Discouraging that one of the main reasons to skip SNES Classic is because "I can steal the games elsewhere."
If money wasn't an option I'd go with both, but if I could only have one I'd probably go with SNES Classic. Neither system will have exclusives but I imagine I'd get many more hours of enjoyment out of the SNES library, even if it's limited to 30 games. Just make sure the cords are long enough...