I have two apps on both markets (more on iPhone). I make more on iPhone for sure, even though I charge a dollar more for one of the apps on the Android. I don't think price affects sales too much as people love the app on iPhone and I think would have been willing to pay the extra dollar had I not undercut myself.
There are A LOT of things wrong with the Android market though that reduce sales. Many things. First, a ton of phones still use 1.5, which doesn't have any screenshots. You can't even tell what TYPE of game you are getting at times without screenshots.
Second, the entire description is limited to something like 325 characters. It just doesn't allow for much of a sales pitch, or even a detailed description of the app. Also, since there are no keywords associated with the app, like with Apple, you have to try to cram your keywords into that 325 description, making it even harder to say something meaningful.
Another really annoying feature is the 24 hour return window. My best app has a return ratio of about 90%, the second one is around 66%. The kicker is that the second app has a demo available. Free demos seem to be meaningless on the Android. I don't mind a return policy, I have bought apps for my iPhone that I really wish I hadn't. But 24 hours is quite a bit of time. It completely disallows for ebooks, and quick to beat games. There is no reason for the customer to pay for it.
Finally, the Android market doesn't have the common sense to wait for 5 reviews before they give an average. My first review for one app was a 4 star review, the next was a 1 star review. Once my average hit 2.5 sales almost completely stopped.
Google has NO experience in creating this type of product, and the utter lack of polish in the Android market shows. Until these issues are fixed, market share is going to mean diddley for sales.