Couldn't really say. Haven't had the opportunity to load alllll of said speakers in mine.
BTW you can get a fat warmer sound from the 40C with speaker break in, I have a V30. NOS pre amp tubes, different bias, EQ settings, C19 clip, all contribute. You don't need to change the speaker necessarily although many do.
Fat is in the low mids
Warm is in the center
Don't be afraid to cut limited eq's (like a 3 or 2 knob eq section) and turn volume up. Sometimes cutting the highs and lows and boosting overall volume is as good as boosting mids.