I’m sorry I don’t see any comparison at all, iOS is a /lot/ less fragmented and iOS devices present on networks have a far high percentage of up to date OS versions installed. Just two months ago I sampled data of a 100~ staff user wireless network and a heavily used guest network, while more than 95% of iOS devices were running the latest version of iOS 10 (the 5% was all bar one a selection of test devices kept back for legacy mobile web browser testing) where less than 25% of android devices on either network were running either the current or latest stable legacy android versions over the same 30 day period.