A: probably not enough Rf (and R9) for extra ‘warm’ CCTs, otherwise similar to 351D offerings (more available CCTs though)
B: would be very tempting for making a tint mix between 2700K and 4500K
C: too bad, that no tint mixing is possible between ‘L’ and ‘W’ group - some people would find 2700K to 4000K tint mixing a bit narrow
D: probably the best option - would let very useful tint mixings to happen (more than one) - a mood variant with 2000K to 3500K, and a base variant with 2700K to 5000K
If DBSAR would make Sofirn to have Nichia variant of BLF LT1, that would be awesome (probably I would just buy those).