L-2B vs MA-1

I've never owned an L-2B but I'd really like to buy either one of those, or an MA-1. Question is, how warm are L2B-s compared to an A-2 for example? Which one would be the more practical choice if I own an A-2, a G-1 and an Irvin?

Am I mistaken or L2B-s were typical in the Korean war, and the MA-1 in te late 50s and Vietnam?

Thanks!

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L-2B vs MA-1