iOS Chrome requires iOS 4.3, while Android Chrome requires Android 4.0. Ironically that means that 99% of the iOS users can use Chrome, while only 10% of the Android users can.
Yes. But in a year that won't matter at all because people update their phones every 1-2 years typically and if they're buying a new phone, it will have ICS o Jellybean.
Meanwhile, Android users will still "enjoy" a fuller-functioning version of Chrome vs Apple's version which will be restricted in several ways.