I wouldn't. I'd just do them the same--they're pretty invisible, anyway.
If you were forming a decorative pattern with M1 stitches, that might make a difference, but for plain old increasing, it'd just go with the M1K's at both ends.
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry