In your position I’d keep your
Ibiza - based on your screen shot above it’s covered less than 9k miles so it’s barely run in, and if serviced / maintained regularly should give you many more miles and years of trouble free motoring.
An Audi A1 is basically a
Seat Ibiza / VW Polo under the skin (apologies to any A1 owners - no offence intended); it just ‘wears‘ a different, more expensive ‘set of clothes’, costs more to buy and service (if using the Audi dealership network) than an equivalent
Ibiza does that’s bought / serviced through the Seat dealership network. As for an A1 being more refined; I doubt there’s much in it compared to a current shape
Ibiza; these days, Audi uses lots of hard plastic trim in the current A1 so IMHO perceived quality has dropped in pursuit of cost savings compared to the first generation A1.
As for the cam belt change intervals - I think this has changed (has been significantly extended), and seems to be confirmed by the posts on various forums at the links below.
https://www.reddit.com/r/CarTalkUK/comments/15eg14l
Hi All need abit of advice here on the cambelt service my cars just turned 5 years old and it only has 9k on the clock, at its last service only thing recommended was Cambelt service which i was expecting having had VAG's for years always changed them every 5 years or so as my mileage is low...
www.seatcupra.net
https://www.aronaforums.co.uk/threads/timing-belt-interval.2040/ - in particular post #16 by tara_c dated 28th Aug 2023