Do you want to sync continuously, or one time? As in, do you plan on continuing to use both email accounts, or are you switching from one to the other?
If you're switching you can simply "export" the contacts from the old and "import" them to the new. If you want syncing, though, you're a little out of my depth. The tools linked to here by susendeep might work, though.
Option-1 using Google contact export/import
http://support.google.com/mail/bin/answer.py?hl=en&answer=24911
Option-2 using external site
http://www.soocial.com
Thanks... google export/import worked perfect.
Do you want to sync continuously, or one time? As in, do you plan on continuing to use both email accounts, or are you switching from one to the other?
If you're switching you can simply "export" the contacts from the old and "import" them to the new. If you want syncing, though, you're a little out of my depth. The tools linked to here by susendeep might work, though.
How to do it using Gmail -
http://www.ehow.com/how_6564366_sync-contacts-between-gmail-accounts.html
Using web service Soocial -
http://www.soocial.com/how-to/sync-contacts-between-gmail-accounts