Women notice it more because women have much higher day to day variance in current attractiveness, due to makeup and fashion.

I think males are subjected to the same appearance biases, but it's not necessarily pure attractiveness. Height and size, for example.

I still think the effect of attractiveness on female-female friendship is much much more than male-male friendship. I don't know if there is some known theory or reason for it, but you can see in a group of female friends, the attractiveness level is in similar range more often than not(of course speaking from anecdotes, nothing to prove).