LeCab v1.0 is simply the IR cab loader of SoloC FullStack with a stereo option.
Here how the stereo option works:
Indpendent Mode : The left signal is processed with Cabinet 1 and the right signal with Cabinet 2. You can position each of the resulting signals with the pan knobs.
Blend Mode : Both signals are processed with each Cabinet. The volume knobs of each cabinet are linked. This time you can position each of the resulting signals with the pan knobs.