I have a Competition. The Competition is the 50 watt single channel little brother to the Quickrod. I can't blame anyone for being confused, the website is not all that clear in my opinion. Here goes:
The Quickrod and Pro Mod are both two channel amps. The Quickrod is EL34 based and the Pro Mod is KT88 based. There is a clean channel and a dirty channel. The dirty channel has 3 gears, each one with a different voice. Gear 1 is Hot Rod Plexi, Gear 2 is Hot Rod JCM800, Gear 3 is Super Hot Rod JCM800. In addition, OD1 and OD2 are available for each gear which gives you a sum total of 7 different voices including the clean channel. Think of OD1 as your rhythm channel and OD2 as your lead channel for each gear. Each gear is like an amp unto itself. They each sound different and are distinct. I go back and forth as to which I like the best - but I really like them all and they're all useful.
The Pro Stock is a single channel EL34 based 100 watt amp. No clean channel but same gears as those above.
The Competition is a single channel EL34 based 50 watt amp. Little brother to the Pro Stock. Same amp but 50 watts.
The gears don't really sound like a "stock" anything. They are hot-rodded, modded, or whatever, versions of those types of tones. My understanding is that Scott did not set out to recreate hot-rodded Marshalls, but instead set out to create what he though hot-rodded Marshalls SHOULD be.
Each model is 1/2 power switchable.
The last time I played a Marshall it was many many years ago, and when I played it I wondered why it didn't sound like any of the records. Simply put, those guys had theirs either modded or some other outboard piece of gear.
The Splawns do not need anything in front to get great overdriven tones. My TS9DX is gathering dust.
I am not a pro nor even a gigging musician, but play mine at home every day. I love it and can't imagine ever getting rid of it. It is very articulate, big ballsy when cranked, no fizz whatsoever... which I do kinda miss time to time since fizz hides your mistakes. The Splawn will hide nothing.