Winter bike / Snow bike thread

I've got a 38c cross tyre I was going to sell, but now I'm thinking of keeping it for the winter.

If you had a 32c and a 38c which would you put on the font and which on the back?

First instinct says biggest on the front... but then as they're both biggish, I can also see an argument for having more grip where the power comes from...

Thoughts?

I run the fatter on the front. Back grips better bearing more weight anyway, and you want all the help you can get at the front end.