Yes, both use the same AEI200A coil pack. The S2 dizzy is a Marelli SM801BX with no vacuum advance, inlet drive, clockwise:S2 Monty distributor, it looks like at least the internal parts are the same.
I guess it depends on your definition of easy an S2 swap would be great, but rare. If you can find another scorpion dizzy and swap the gear from that onto the Spider one, then it should be good to go without destroying your working unit. You may need a replacement roll pin as the original marelli one could be the rivet type like in the s2 pic. I had thought that the possible asymmetric reluctor lobes would be an issue, but even the Spider dizzy is CW, so it's no probleman easy drop in replacement dist