In my personal opinion, the only distinct difference between the different variations of
and it's variants is the capture location, and I'm fairly convinced that the range of variations is nearly infinite - what I'm trying to say is that if you catch a fish halfway between the L27a capture location and the L27b capture location, it will look like something about half-way between the two (although of course it may be closer to one than the other).
If you know where your fish came from, then you should be able to determine which variant it is. If not, then we could possibly GUESS it's origin, but it would be a guess. From most aspects, it won't make any difference which variety you have.
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Mats