Except for the fact that the snubby is lighter, it loses on almost all other counts.
- The .38 round is much inferior to the 9mm, even in +P.
- The 442 only weighs 15oz, so light that recoil much worse than the G26
- The 442 only carries 5 rounds, compared to 11 for the G26
For those who suggest using a .357 snubby, I've never shot one, but I read that the recoil is brutal and the performance in such a short barrel is no better than the 9mm. Again, the G26 wins.
Now, if you want to consider the M&P 9mm compact, that's a better choice. But at this point in time, I would still vote for the G26, because it's more mature, has far more aftermarket support, and is easier to work on.