huge difference being most android widgets are absolutely ugly as **** and generally never go with a theme or launcher or icon set i'm using. like someone else here, i also like to check scores for nba games and i tried adding thescore widget and the yahoo sports widget to my s6. both are atrocious.
not to mention if i have to go back to the homescreen to view it, i dont see how thats any different than just multitasking over to the actual app. at least for iOS, the widgets in the notification center all look pretty uniform and clean for the ones i've tried.
Widgets on android are soooo much more functional than anything IOS widgets have to offer. They can be made from just about ALL apps you install. You can move and position them ANYWHERE you need them. Any screen or have them take up the whole screen. You can have a widget take up 3/4 of the screen then have icons under the widget. It's not even a close contest to be honest. Take weather widgets for example. Right there on my home screw I can have the weeks forecast without having to do anything. I am already on my home screen anyway. Widgets on Android display more information where you are most like to see and use them.