I too can compare the ZS to the 28kWh Ioniq, which was an "air knife" when it came to aerodynamics. Unfortunately, the range wasn't enough for my needs, and I bought it as a stop gap until the 64kWh Kona arrived in the UK. The Kona was a surprisingly efficient SUV and I regularly got over 300 miles of real world range.
The Kona did have some design flaws though and needed a new reduction gear after 12 months, and had started to wear again when I part exchanged it.
The ZS is roomier in the back and has a larger boot.
I love the sky roof and have had it open a lot during the mild autumn.
The suspension isn't has hard as the Kona and I find the handling is much the same.
As with any change of brand, the infotainment screen is . . . different. You just have to find your way around it and get used to it.
The regen in the ZS isn't as good as in the Kona, and I do miss the paddles to knock it up or down. However, the ZS does let you adjust KERS whether the ACC/Pilot is on or off, and you can set the speed while the car is stopped.
The iSmart app is not that bad, about the same as the Hyundai Bluelink app as far as I'm concerned.
Overall, very pleased with the car.
Oh, and P.S, far less phantom braking from MG Pilot than in the Kona.