The S, SX, STX, Premier, Skeet Reese etc. are all on what I would call their original small frame....smaller that a Curado 200-size.
The Revo Inshore is their medium frame which seems to be the same/similar size as a Curado 200/201 frame.

The STX is a magnet reel, so make sure you want that.

DD
Who has has a Skeet Reese, an Inshore and a bunch of Greenies.
This one sees most of the action...

I think that I may have finally worn out the gearset...we'll see after the next service. If so, not bad for 17 years of service and numerous teardowns (clean and lube) and easily replaceable.
They built the B models too well. I expect they will stop producing parts, if they haven't already.