Hi,
The E815 and A920 have the same features, but the A920 has speakers, and is midnight blue.
The A920 costs a lot more than the E815 on Bell. Currently, you can get the E815 for free on a three-year plan, or pay $200 for the A920 with a 3-year plan.
I went with the E815 over the A920, and it has been great.
Reception is great. Save the money to buy a bluetooth headset, or a transflash card, plus adapter, $38+$20
Don't buy into the hype of the A920