I had the opportunity to try both amps...and I ordered a Road King.
It'll arrive this week (well, I hope so...)
Here are a few elements I hope will help you choose :
- RK allows you hear the exact difference between 2 tubes complements (6L6, EL34) without swapping. You can be amazed at how different it sounds. It's very interesting to hear the differences between power tubes without changing the remaining components (preamp voicing and setting, cabinet...). I never had experienced this before.
- Cabinets and speakers are certainly the most overlooked components of tube amps. It's not black art. There are huge differences between speaker brands and types, cabinet types (open, closed, 2x12, 4x12)...
It's a very good idea to try amps, but all of us should try cabinets/speakers as well. Even if your favorite guitar player plays 4x12, you must try a 2x12 openback and maybe you'll like it because it depends on the playing context (band, music style, volume, room size, ...)
RK allows you to choose 2 types of very different sounding speakers in order to compliment the settings of the amp.
- Tube rectification of the RK has a great impact on tone. It's also worth experimenting... It compresses tone in nice and musical way.
Let's summarize :
If you like experimenting (and if you have time and energy to do it) go for the RK because you'll have fun with all these features. You may even learn things at experimenting and have changes in your preconcieved ideas (if you have some) about tubes, speakers, ...
If you play in a cover band with many different styles you may take advantage of the RK.
If you dream having a Marshall AND a Fender at a gig without the hassle of routing guitars, FX between 2 different amps, maybe the RK is a good choice
RK is a luxurious toy for people having fun experimenting and an amazing tool for those who need radical changes in tone from the same piece of equipement.
If you don't need your amp to change personality like a schizo go for a Roadster; it would be a waste of money to buy a RK.
Road king channel 2, in brit mode with EL34 allows you to get convincing old marshall low gain tone. Kashmir is not that far. El34 gives you some "rasp" you can't get with 6L6. Sure Roadster can give you the same when fitted with EL34.