Gmail is neater but Yahoo is not bad.. but overall, nothing is better than any of these two.
The only reason i am still with Yahoo is that Gmail fails to load sometimes, and i can't wait for it to come back. I have my mails set to arrive at both my gmail and yahoo accounts.
I use both Ymail as well as Gmail.
my favorite is Yahoo..
I am using it since i was online for the first time..
gmail is the best