Compared to the March batch the February batch is $450 for an extra month at (presumably) lower difficulty.

In stock is $1600 for an extra two and a half months (and $1150 extra over the February batch for at most 5 or 6 extra weeks).

Personally I'm going for the March batch but I'm limited in how many dollars I can turn into bitcoin. Without that constraint the February batch seems like the best deal (unless the difficulty jumps quickly in the new year then maybe the in stock is the best deal).