So Mini Cooper S, same sort of engine and performance (ish) and a slightly lighter car than a Mk7 GTI PP, slightly better MPG.
Not really any surprises there.
I don't know if you were just curious for total cost of ownership calculation or definitely trying to save money.
A manual GTD would give you excellent fuel economy, but so would a Cooper SD if that was your only thing you wanted to sort out.
Oil burners aren't for everyone though, some because of driving patterns, others because they think they don't like derv
