Disclaimer - Mine's for sale in the emporium. Along with a Smallbox.
That said, I have a one amp rule. I like the Runt. MUCH more than the 2 BE-100's I have owned. But there was an amp that I had been gassing for that came up for sale and does not come up used often, so the one amp rule was in effect. If I didn't get this other amp, the Runt would not be for sale.
The Runt's DNA clearly sits in the BE-100 camp. For me, the Runt gain is far more effective than the BE when the volume was rolled down on the guitar. The BE flattened out/dulled too much for my liking when rolling down the guitar volume. Runt doesn't have that "issue". And I never liked the HBE. I think the clean is far ahead of the BE100.
For the price, the Runt is very difficult to beat. And no, I'm not a Mesa fan, so the TC50 isn't on any radar of mine.