Just got quotes for my daughter (17, still learning, but based on her having passed and owning own car). Direct comparison of different cars:
Pug 206 £2,553
Ford KA £2,193
Fiesta £2,714
Fiat seicento £2,193
Corsa £2,063
Clio £2,245
So no great difference on the smaller cars. (they were all with me and wife as named drivers too)
We’ve currently got her on Marmalade learner insurance at about £80 a month, but note that this only covers a pre-insured car ie the extra to add a learner.
The cheapest price I found so far was with cooperative, with a black box installed and no driving 10pm-5am. No good for us as daughter often doesn’t finish work until 10pm. If you break the terms, ie driving late or triggering the black box, you get charged extra premium, which is a bit of an unknown quantity!