Well I havent seen much of the blue/red primos, but I find that primos last slightly longer. on the hook once the little nubs wear down (it will happen quick) there isnt all that much grip for feet, making gliding/koosh/standup/1fww/anything foot on tire related slightly harder. it happens on the primo too, but after the nubs are gone the overall tread of the tire works well still.
I’ve got a blue primo on my Yuni freestyle, but I haven’t gotten a chance to ride it on any gym floors or anything. I’ve only ridden it in my Grandma’s basement on the cement and can’t really tell if it marks or not.
What’s amazing about the hookworm is it is grippy for turns but not for
spins. At least on the surfaces that I have tried it on – a coated wood
floor and a vinyl tile floor.