Mk1 Mex came from factory with 1600 crossflow, whereas RS2000 used a 2.0 pinto - probably the main difference!

Mex has thin stripes along top of wing, door and rear quarter whereas RS had a thick stripe along the middle...although they could be specified without.

As far as I know they were both known as type 49 shells that were built at AVO so think they have extra strength points to base model shells?

I'd imagine the RS2000 was more expensive back in the day however I'd say each is as collectible as each other! I'd love either lol!