I was turned off using different speakers in the same cab or even different cabs through the one head when I got
my 1960BV (v30) to keep my 1960A (t75) company. I have only tried playing through them both with my Marshall TSL so might give the diezels a run through them. However I've found I prefer the tone of the Diezel's through my 1960A than my 1960BV, but I MUCH prefer my TSL through my v30 cab. Odd.
I too am tossing up between the front and rear loaded cabs. I dont want a cab with a super quick attack, I want some give/sag in my picking. I'm not big on surgical precision, I want mojo! But it must be able to handle high volumes and reasonably high ampounts of gain, whilst also cleaning up beautifully. I considered the 412RL with Tone Tubby's but have only heard horrible sounding clips on youtube of them, obviously I'm not expecting youtube to be a perfect reference, haha. The clips I've heard of front loaded with G12K100's seem to have that really quick attack and it seems to have a bit of a sterile/surgical feel from what I can gather.
I had heard the g12k100's were similar to the G12t75 speakers, which pushed me in that direction - as well as hearing that the tone tubby's don't do marshall tones very well, and I'm a marshall tone kinda guy. I want a modern day brown sound on steroids, I guess you could say.
I wish Diezel had cab's in Australia
, buying both would just mean I'd have to wait longer to buy them as I'd try and save on shipping that way. If I didn't like one, I'm sure I'd have no trouble selling it on the Aussie market. Arrgh, this is annoying business! Perhaps some demo videos of both cabs through different diezel heads are in order, any one at Diezel HQ got some time on their hands?