I did an A/B of my Thunderchild 12, non-acoustic version, and my LDS nEarful 12/6. I mixed and matched with my Shuttle 9 and Streamliner 900 and a couple of basses, the results are in the AudioKinesis and Streamliner threads if I recall correctly.
When paired with the S9 I gave the slight edge to the TC12, winning on clarity, and with the STL-900 the slight edge to the LDS, winning on deepness. All IMO, of course.
Overall I thought the two cabs were very, very close in achieving my tone goals with my EQ settings, etc. You can't go wrong with either IMO. I eventually sold the LDS because the TC12 is every bit as good and easier to schlep, and I have a TC15 on order

which should negate any need for the slightly larger and fuller LDS.