Firstly, you're posting on an Android message board. That's going to skew the numbers a little bit. Secondly, asking which OS is "better" is one of those impossible questions to answer. It all comes down to what you plan on doing with the device in question, and what you want your experience to be.
Android devices have a wide range, because there are so many manufacturers. But if you look at the top-end devices, you will find a greater amount of flexibility and productivity potential than if you were to go with an IOS device. You will also be able to enter the marketplace at a cheaper price-point than if you were committed to buying ONLY an IOS product.
But IOS products have their perks too. The interface is clean. The operation is ridiculously smooth (Android people can be in denial all they like, but Android lags and jitters a lot, if you aren't using a stock Android device.) And if you're looking at a tablet, there are far more apps optimized for tablet-use on IOS than Android. Of course, going with IOS, you would have to give up the ability to customize your device.
In my personal view, a tablet cannot compete with a laptop or PC when it comes to productivity. Tablets that claim they can be "productivity devices" are kidding themselves; it just isn't easy to get most things done on a tablet. They are good for watching videos, and surfing the web, and other non-intensive entertainment things. And if that's all you're going to do with it, the IOS experience is a better one. But that's only if money is no object.