Herman Miller Aeron vs Steelcase Leap: which £1,000+ office chair is worth it?

Mesh or foam, twelve-year warranty either way. The difference is how you sit.

Aeron for warm rooms and people who like firm support; Leap for anyone who wants a padded seat and deeper recline. Both will outlast three cheap chairs.

Sit in both if you possibly can. Warm room, firm-support preference, or you're outside the average height range — Aeron. Want padding and a deep recline for long days — Leap. Either is a ten-year purchase, which is what makes the price defensible.