Hello! Wondering if anyone can provide insight into the fit of the Track That vs. Hotty Hot shorts for me.

I want to order the Track That 3” shorts for running, which I’ve heard are a little more roomy in the legs, but not sure about sizing. My normal size in the Hotty Hot 4”shorts was not comfortable as the liner cut into my legs a bit, but when I tried the next size up it was clearly too big in the waist. Thanks in advance!