I have two hop plants, and have somehow lost the file meant to help me remember which species they are. I am hoping a description and some pics will help you folks help me out. The two plants are pretty different from each other.
Being an ale fan I suspect that my two hop plants are in the Cascade / Centennial / Chinook / Willamette class. However knowing me I might have also planted a more unique species.
The vine is a definite climber, not a spreader, and not very prolific. Two sections of 2 vines each have both climbed about 20 feet up to the top of my house. The leaf units are about a foot apart going up the vine. The flowers appear mostly at the end (top) of the vines, and not as many flowers are produced as we see on Species B.
The flowers are fairly compact, squarish in profile when viewed end-on.
The vine is a definite spreader, and a *very* prolific plant. It's basically a 7ft-wide, 8-ft tall bush which has taken over my neighbor's garden (they were gracious enough to let me grow over there).
The full-grown flowers are much longer than species A and seem to have more of an elliptical profile. My money is on Cascade here, if I were forced to lay a bet.
I'd vote against A being Centennials -- I'm growing Centennial, and while the cones look about right, the leaves right before the clusters of cones are different. Your A bine seems to have mostly one- and three-lobed leaves out by the cones, where my known Centennial has just about all five-lobed leaves out there at the ends of its side arms.
On the other hand, my bine is constantly whipped by the wind and probably nutrient-deficient, so, it may not be a valid comparison.