Adizero Adios Pro 4 vs Endorphin Pro 4

Reviewers mostly liked how the Adios Pro 4 runs, and their complaints were about their toes. On speed they're close to unanimous: softer and bouncier than the Pro 3, a lot lighter, and properly quick once you're at 10k to marathon effort. The Run Testers found it lighter and cheaper than the Alphafly 3, if a little less springy. On fit, the toe box tapers, it runs a little short, and several testers had sore toes by the end of a marathon. So this is a carbon racing shoe for neutral runners with normal to narrow feet who race with some intent, from 5k up to the full distance. It's less happy at jogging pace or under a heavy heel strike. The newer Adios Pro 5 has a lower RRP and more padding at the heel, so check the price table before paying full whack for the older shoe.

Saucony softened the Endorphin Pro for version 4, and most reviewers think it was the right call. The Pro 3 was quick but harsh by the second half of a marathon; this one gives up a little of that snap for a ride that stays comfortable over the full distance. Women's Running UK rated it highly and recommends it for marathon and half marathon runners who care more about finishing strong than about the last few seconds. The trade-off is weight, since two reviews found it heavier than the Pro 3. It's a carbon racing shoe with an 8mm drop and a stable, wide base, which makes it one of the easier super shoes to run a whole marathon in if you land on your heels. The Endorphin Pro 5 has since replaced it at a lower RRP, so the Pro 4 makes most sense when a retailer is clearing it well below £230.