I prefer Clifton 9… oddly I am an 8.5 in the Clifton 9. When I tried the Clifton 10 at Fleet Feet I needed the 8’s… These have been worn one time on a 6 mile run outside and I’ve probably done about 30-40 miles or so on my Tread. They have been used indoors for the most part. Like new quality with very minimal mileage wear on bottom! Open to offer. Just want to get rid of them.