Really interesting article in the print edition of Autocar that came out last Wednesday - a group test of several of Volkswagen UK's GTI collection
You'll need to buy the mag for the full feature - it's not on their website
They test the Mk1, Mk2, Mk5 and Mk7 against each other, having discounted the Mk3 and Mk4 as not really being worthy of the badge, and the Mk6 and not being different enough from the Mk5
...we had few qualms about skipping versions three and four. Six was also left in the lorry because we felt sufficiently close to five...
The Mk7 GTI gets a really good write up, although not the overall winner
..the most coherent re-imagining of the original GTI philosophy there has been in these past four decades...the Mk7 does it to a world class standard...
https://www.autocar.co.uk/magazine