Disagree with the Helios part, agree that you could definitely justify both. They are definitely different enough animals, to where there's only a bit of overlap.
While the low end thing is true, I think the Helios is by far bogners best offering - as you say, it's got a lot of nuance and mojo.
Which in my opinion makes it have a lot more "personality" than some of their other amps.
If I had unlimited money to spend on gear, that's probably the one bogner I would want to have around. Henrik from Evergrey gets some really sick tones out of it on recording, too.
I have a bit of a love/hate relationship with the few ecstasies I've played, but there's no denying the blue channel is killer. I think it's just a more "lead tone" oriented amp, and that isn't for me.