If you like using Samsung Pay, then don't jump
Currently on everyday spend spree with it. So fast like I don't want to bring loyalty/members card and credit card.

For iPhone 7/7+ side, simplicity still the best. I can't say much about it as I don't like it been non-jb.
If jailbreak, iPhone far more better than Android. Even rooted can't be compared with iOS-JB.

Isn't the 10.2 already have jb? I missed the update, as now Apple already signed it. Latest is 10.2.1 still no jb.
There are a lot of features that will make a different with stock iOS.
• Automatic call recorder (which is not supported by app only, need access from system)
• DataMeter (so you know how much data you used and be alert not to nearly use all of them before reaching end of the month)
• 6x5 or 7x5 icon layout is more nicer than 4x4 or default iphone layout
• 5x5 or higher apps in folder is better than 3x3, which more easy to find your app with a lot of apps in it
• rename app that have long name
• multiple WhatsApp or clone any app
• tinybar notification instead of big-ass box on the screen
• remove the volume down when notification arrive
• a little effect here and there in homescreen and apps like dark skin, color badges, glow badges, etc
• remove unnecessary item in control center

The most important thing is
• REMOVE ADS in apps, youtube, browser and all

These things I will miss if I don't JB them.

If Android, I only root to remove the ads since Android can do a lot of things that I state earlier.

You should try to JB and see JB is not only for installing free paid-apps and do illegally which most people think JBreaker will do, it's far more better than that.

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Back to topic, , I'm searching for iphone 7+ with iOS 10.2 to JB. Until now, hardly can find the new unit that come with it.

I need to get iPhone 7+ with 10.1.1 first
I keep looking one