Adizero Prime X 2 vs Superblast 2

The Adizero Prime X 2 is adidas going deliberately over the top. It is a supermaximal carbon running shoe with a stack so tall it sits above the World Athletics limit, which means it is not legal for record-eligible racing. That is the whole point. Freed from the rules, adidas piled on Lightstrike Pro foam and a set of carbon EnergyRods to build a long-run and marathon-training shoe that returns huge energy with almost no legs cost. You feel launched forward once you are up to pace. At 285g it is heavy for a carbon shoe, and the ride is more cruise missile than nimble racer. If you want a legal marathon racer, the Adios Pro 4 is the sibling to buy. If you want the most protective, most propulsive daily and long-run tool adidas makes, and you do not care about race legality, this is it.

The Asics Superblast 2 is the rare running shoe that does almost everything, and does it well. It is a super trainer, not a racer, with a towering, springy midsole and no carbon plate, yet it still has the bounce and turnover most runners chase on plated shoes. We rate it as one of the most versatile daily trainers you can buy. At 249g it is not light for a no-plate shoe, but you forget the weight once that big stack starts rolling you forward. Easy miles feel plush, long runs feel protected, and a tempo or a half marathon brings out a genuinely lively ride. The catch is the price: at an RRP of £200 it sits in race-shoe territory, so it asks a lot up front for a do-it-all trainer. If you want one premium shoe for most of your week, this is the one to beat. Those after pure daily value should look at the cheaper Asics Novablast 5.