Stability and comfort
Purchased the ace after the flyer was not providing enough support and shock absorption after the 20+km. Have run a 5 and 13km and forgot about the change of shoes after first few seconds of running- a good thing as obviously weren’t noticeably heavier and the rocker motion didn’t significantly alter my running style. I have weighed my flyer against the ace (W6/EU 37) and they are only 58g heavier, worth it for the additional supper and comfort offered. Speedboard and heal cup feels firm but comfortable and toe box is more roomy with no chaffing on my little toes I was experiencing with flyer - despite same cut to flyer toe box - possibly because the shoe is more stable and foot rolling motion / friction is reduced.