Adizero Prime X 2 vs Hyperion Elite 4

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 Hyperion Elite 4 is Brooks going all in on the marathon: a carbon racing shoe with one job, and it does it with a surprisingly light touch. At 196g it is not the lightest super shoe on a shelf full of sub-190g rivals, but the balance is where it wins. The nitrogen-infused foam feels bouncy without the top-heavy wobble some race shoes carry, and the carbon plate keeps you rolling forward once you settle into pace. This is a road running shoe built for race day, not your easy miles. It suits a runner who wants a stable, predictable ride they can trust for 26.2 rather than the twitchiest, most aggressive tool in the pack. Against a Nike Vaporfly 4 it trades a little raw pop for a calmer, more planted feel. At £245 it sits right in premium carbon territory, so it earns its place on merit, not price.