But no, it's not fair to say it has more in common with a 6s, because it doesn't, it has more in common with the Air and performance slightly better than an Air 2,
Well, no, that's not true and it's easy to verify.
It's significantly faster than the iPad 2, about 1.5x, in all but multi-core geekbench (no surprise, given the core count) where it draws level.
Better battery life too.
http://www.macworld.co.uk/review/ipad/new-ipad-2017-review-3656385/
Compare Geekbench to MacWorld's own 6s review and you'll see they're pretty much within margin of error, or at least near as doesn't matter. I even used the figures from the 6s+ to make it a fairer fight.
http://www.macworld.co.uk/review/ip...y-uk-geekbench-benchmark-audio-cheap-3623611/
Geekbench
iPad Air 2: 1823
iPad 2017 Single Core: 2359
iPhone 6s Plus Single Core: 2527
iPad Air 2: 4343
iPad 2017 Multi Core: 4340
iPhone 6s Plus Multi Core: 4407
Same story in graphics performance, all sourced from the above URLs. In fact, here the iPad 2017 pretty much destroys the Air 2 and beats the 6s handily too in the T-Rex test, though can't keep pace in Manhattan.
GFXBench Metal T-Rex Onscreen
Pad Air 2: 41.6 fps
iPad 2017: 56.1 fps
iPhone 6s Plus: 38 fps
GFXBench Metal Manhattan Onscreen
Pad Air 2: 29.3 fps
iPad 2017 Single Core: 28.6 fps
iPhone 6s Plus Single Core: 37 fps
Odd to make such a specific claim that's so easily refuted.
I'd say it's fair to say it has more in common with a 6s.