The Classroom Super Kit includes all the parts for the Clawbot.
The Classroom Starter Kit is effectively a V5 Clawbot and Control System - a great way to experience the basics of V5 and build a robot that you can control and program, adding part later when you are ready.
The Classroom Super also contains the Clawbot and lots of additional parts intended for exploring STEM concepts in the classroom. The structural parts are steel and you get lots of mechanical parts that are made for classroom projects rather than competition.
The Competition kits have aluminium parts are are aimed more at what a competition team would need. The Competition Starter Kit can be used to build the example Crunch robot (you deffo could do it with a Competition Super too as they have a lot more parts, but you might need to tweak a part or two as some may differ slightly), but generally these kits (especially the Competition Super Kit) are aimed at getting you into the world of VRC where you would design your own robot.