Google's GMail and yahoo's email are both used for Internet communication and transmission of information from one place to another place speedily and fastly . But you know there are many differences in both facilities .
1st Difference
Gmail provides us 1 gigabyte limit of storage of our mails which is more than yahoo. Under this storage , there is no need to delete any message in GMail
2nd Difference
Gmail has high scanner for scanning spam email , but you have seen the number of spam is in yahoo! Mails are very high.
3rd Difference
Gmail provides chat facility and now also providing video chatting in GMail account , this service is not provided by yahoo! mail service
4th Difference
Timing of attachment in gmail is very less than yahoo document attachment .
5th Difference
Yahoo provide folder facility in yahoo!mail account but gmail does not give such facility .
See Also
Difference between google search engine and yahoo search engine