Welcome to the forum.
I think it will boil down to what you want from the amp. I play more ‘Modern Heavy-Rock’, and stay away from lower-gain tones. I’m a huge fan of Mark Tremonti and John Petrucci, both style and tone, and I’ve always searched for that mix of power and precision in my tone & playing.
I'm also a devoted Roadster player, over a decade now, and I have just picked up a TC-100.
I've gigged a few good amps along the way.... Started with a Triple Recto in 2001. After gigging with that amp for about 4 years, I started to dabble in other amps (Carvin V3, Marshall DSL, Peavey 5150), but after a few years I realized that nothing compared to that Recto Modern Heavy rhythm tone. I bought the Roadster mainly for the built in spring reverb, which I don't even use anymore LOL, but the amp seemed a lot better for lead/solo playing in the orange channel compared to the Triple Recto, and Ch1 Tweed is the best clean tone I have ever dialed in on a high gain amp.
Again, always searching for 'that' tone, I've tried a couple of different Mesa's while owning the Roadster (MKV & Stiletto) but always ended up back at the Roadster as my main rig. The MKV was great for leads, but lacked the character I needed for rhythm playing. The Stiletto was great for that modded marshall JCM800 tone, but eventually I realized that's not what I'm looking for.
I’ve only played the TC-100 a couple of times at home, but I’m really liking this amp. Tomorrow night is band practice, I’m excited to hear the amp with the band. I’m betting that in the mix my rhythm tone will sound similar enough to go un-noticed, with the bonus of a great feeling lead channel from ch 3 of the TC-100, which is my only gripe with the Roadster. The Rectifiers I’ve played have always been a bit stiff, and even after having the Roadster modded (a custom mod by Trace at Voodoo Amps), it still feels a bit stiff for some of the technical stuff I try to play. The TC-100 feels more like my MKV, but with a fuller bottom end that I think lends itself better to my style of playing. I just don’t know if I can get the same clean tone character with the TC-100 as I do with the Roadster (Ch 1 Tweed).
We have a benefit show coming up on Feb 1st, so I’m not planning to move the TC-100 into my A rig until after that. Tomorrow I’m going to play a couple of our straight forward tunes, (guitar->cable->amp), no cleans and a fair share of lead/solo work so I can get a better opinion of the amp, I’ll let you know what I think.
Once I have the TC-100 hooked up to my MIDI rack it will be a better comparison for me.