I haven't missed the point of the discussion at all. You have simply decided that the original question was not worth asking. No-one surely cares who has the bigger LMC, just interest as to why they might be different.
Maybe he/she was just interested in knowing the numbers!
The figures used by my company are not arbitrary. They have been researched by the Perf dept and given as a total OR fwd/aft hold limits that keep the trim within limits accepted by the authority as not requiring a recalculation; ie. at the limits of LMC in any area, the effect on trim will not have a significant performance effect.
As every take off is based on improved climb and a small weight change can produce a relatively significant flex/v speed change, the take off figures are always recalculated.
If others have different limits for different aircraft - fine. If the authority is OK with, carry on.
I still maintain the original question cams across as being asked out of curiosity - hence the answers that followed.