I have researched them many many times. Differences of Kona, Soul and ID seem to be down largely to aesthetics and physical disparity. The Kia Soul is easiest to drive, given better all round visibility and higher stance. Kona Ultimate is best value, looks more conventional and has sunroof. ID is more car like, lower and relatively expensive when compared to the Kona. For me, the value of the Kona Ultimate is difficult to beat, though the quirky design of the Soul and higher stance would make it an easier car to drive. Bigger windows etc. More room in the back and increased headroom. You need to drive them all and find a favourite. I know dealers have been suggesting that the Kona is under priced and will rise next quarter. The Kia is very idiosyncratic and the ID3, one for the car like VW fans, of which there are many.
I did a big breakdown of all the costs involving typical drives over the course of a year and for me a fossil fuel hybrid car carries a penalty per year of between £1388 and £1794 over electric. Pure fossil fuel cars don’t bear thinking about if Petrol appears anywhere in the spec. Don’t forget to add in the value of a free charger too.