I don't have v10, but I can say this.
If you want to try something new, do it.
I find that you can't do half the things on iOS that you can do on Android.
And then you take into account all of the things that you can do specifically on the v10 versus the iphone 6s+?
You pay more than $300 on a phone just because of the name of the manufacturer, not the specs... I mean, this is your wife's money, and assuming she earned this money herself and she is giving you full rights to the phone, if you don't like it, you can sell it and get another v10 as well as a new android wear watch
Basically, I mean this:
-You can stick with Android. You keep all of your features, you don't have to get adjusted to a new, more restrictive OS (which can be a lot more confusing than switching to a less restrictive OS), and you don't have to set up a new phone.
-You can try the iPhone. If you like it, I'll be praying for you. If you don't, sell it, buy a V10 (or even a different Android phone - might as well mix it up while you're mixing it up right?), and buy yourself something pretty to go with it.
If you've never had an iPhone, then you may want to try it, so you can at least say that you have and you legit didn't like it. Otherwise, you may decide that you regret not trying it.
All I know is that iPhone is definitely NOT for me. I'm too much of a free spirit, and it saddens me when people say that they are yet they still refuse to try Android for the stupidest reasons.