12,500-mile service intervals on a car driven 30,000 miles a year will ensure the engine remains in peak condition. By 20,000 miles, even clocked up as quickly as you do, there will still be some oil contamination by the time the oil is changed.

The Mazda is chain cam while the Citroen is belt cam, but the Citroen should give better ride quality. For this sort of mileage avoid big wheels with low profile tyres or you might be having to replace the tyres every four or five months.