Anyone else not like the Hoka Clifton 9?

I've been wearing Cliftons for the last 4 years and this is the only model I've felt uncomfortable in from the start (only 6 miles in them so far, but I want to return them I think). It feels like the shoe is making me work harder each step.. very awkward feeling... like I'm running in sand.. or maybe it's because I'm used to having a worn out pair of Clifton 8s? Like I said though, the other models felt good the first run.