That's easy the Suzuki Swift has the reputation as one of the UK's most crashed cars thanks to it's poor handling and steering, the stats show it as a liability to Insurance companies. The X19 on the other hand in it's day was relatively good had a good handling record and I suspect claims were low which is probably the comparison the insurance company were making. You would have to be a very poor driver to get out of shape in an X19 nothing wrong with the braking IIRC more the choice of tyres on the car some of which (firestone) dramatically increased stopping distances.
I deliberately stayed away from the swift for the above reasons
I've spun an X1/9 more times than I can remember, I've also rolled one. They are safe up to a point, then bite. Braking in the wet is terrible, as the front locks up as they are so light. The X1/20 (Montecarlo) was taken off sale for a few years for the same issue.. they removed the servo on S2 cars...