Adizero Adios Pro 4 vs Metaspeed Edge Tokyo

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.

The Metaspeed Edge Tokyo is ASICS at its sharpest: a 159g carbon racing shoe built to chase a personal best on the road and not much else. It is the Edge, so it is tuned for cadence runners, the people who get faster by turning their legs over quicker rather than by reaching for a longer stride. If that is you, the geometry here works with you instead of fighting you. At 38.9mm in the heel and a 6.9mm drop it sits right at the front of the modern marathon shoe pack, and the carbon plate gives you a firm, snappy platform that wants to roll forward. This is a race-day tool, not a do-everything trainer. Step on at easy pace and it feels stiff and a touch unforgiving. Hold goal pace and it comes alive. If you lengthen your stride to find speed, look at the stride-biased Metaspeed Sky Paris instead. At £230 it is a serious outlay, so be honest about whether you will use it.