How do these size compared to the...
How do these size compared to the Pontas?
I would size them the same size, or 1/2 size larger than your Pontas, depending how far your downsized from your street shoe.
I wear a 9.5US street shoe, my first pair of Preds I bought a 9.5 and I thought the break in was pretty painful. If I were to buy them again, I would buy a size 9. They tend to stretch out a bit over time.