First bite at the elephant:
Because they are using two different scales. The Clarus is a bass/fresh water one, and the Talus (good rod by the way) is a salt water one. Apples and oranges. Roughly a heavy rated bass rod, will be a medium inshore salt water one, but there is no standard, so not exact.
The 6-7 rod you are looking for lives outside the bass isles. I like the lighter St Croix surf rods in 7' or so for what you are describing, Okuma, and Tica make some nice ones too.