The short answer without knowing anything is yes but there a whole lot of variable that can make them sound like different beasts all together. In general I find the Roadster to be a darker sounding Recto, but with some tweaking you can get it sounding as aggressive as the regular Rectos.
The first thing I would ask is did you demo it with the same cab you use with your other Recto? Both using diodes? Both using 100 Watt mode? Were you in the Bold setting on the Roadster? How old are the tubes in the Roadster? Did you try using the same settings?
For me personally, I find the most aggressive/brutal tones in channel 4, modern, 100 watts, diodes, bold, completely bypassing the loop. The guitar and cab can play a big part as well but I'm assuming you were using your regular guitar through your regular cab. As for the settings I tend to go bass 12, mids 11, treble 1-2, presence 9, gain 1, volume 9 when bypassing the loop, 12 when i'm not (all settings like a clock). Obviously you'd adjust to taste, especially if your cab/guitar/pups differ from a PRS McCarty with 57/08s and a Basson 2x12 (which I'm assuming they do).
If I were in your shoes, I'd really look at the other factors the Roadster brings to the table that your current Recto does not. The cleans on the Roadster are absolutely the best i've ever heard on a Recto and with the channel cloning you can get a very wide pallet of sounds (especially if you incorporate an OD or two... not that you have to). Channel 1 Tweed is to die for and really a hidden gem in this amp, especially since you can still get a squeeky clean sounds out of channel 2 clean or fat. To me thats the biggest differentiating factor between the Roadster/RK and the regular Rectos.
Hope that helps.
