Want to know how the G1 stacks up against the iPhone? BillShrink.com launched a comparison site at www.billshrink.com/g1-vs-iphone where consumers can view each phone and related service plans.

The site includes comparisons of features, such keyboards, network speeds, Wi-Fi and GPS, as well as the total costs of buying either one of the phones and the monthly service fees.

Both the G1 and iPhone are leading-edge in a new class of phones, and BillShrink executives thought it would be interesting to compare and contrast the devices and let consumers see them side by side, said BillShrink Co-founder Samir Kothari. 

They also wanted to help users understand what they’re getting into if they sign a 2-year contract. The rate plans for the iPhone are quite a bit more expensive than for the G1, he noted. Unlimited data and messaging with the iPhone through AT&T is about $50 a month compared with about $35 for the same services with T-Mobile USA and the G1.

The site also asks people where they live so that it can show the best signal strength; T-Mobile’s 3G network is in fewer markets than AT&T’s, so there’s that to consider as well. The site currently doesn’t get involved in the applications that are available, but the company might add that if consumers express enough demand.

BillShrink offers a service free to end-users to compare cell phone plans to see what fits their needs and gets a commission of sorts when a consumer signs up with a service provider. It has added a credit card comparison as well. The company has not yet committed to its next vertical, Kothari said.