There is a lot of variation in Rat Terriers---but I do think Hank resembles a Standard RT.
He kind of reminds me of a male version of this girl (Photo from google) but with a thicker cattle dog coat
Hank is built like a Rat Terrier, seems to have the hoppy, joyous attitude of one and the spots & Bentley Mark of the ACD--seems like the perfect combo to me!
He doesn't have to be, and probably isn't, a perfect 50/50 mix of two breeds. Heck, he could be 75% RT and 25% ACD....or be a complete mix of many different breeds.