They can definitely vary significantly from variety to variety. I find it extremely interesting to taste the character of these hops on their own, and have considered a line of juices that don't blend varieties at all, instead focusing on one individual hop.
This is something I'm in the process of experimenting with, as we have received a handful of requests for a straight-up IPA juice since the introduction of the Hop Harvest line. The flavor profile has, so far, been difficult to pin down. Even with the malt there is a certain character missing, probably due to the absence of alcohol. We're going to keep working on it, though. Hopefully we'll have something good enough to offer in the next couple of months.
As I'm sure you can understand we're keeping our extraction process something of a trade secret at this point. I will say that all the extraction is done in-house using whole cone hops, and the extracts are triple-filtered before being blended. We do not purchase pre-made extracts for this juice. The breaking down of the Alpha Acids that you mention, known as isomerization, is definitely a big variable... you're absolutely spot on regarding the timing and heat. Just like brewing a beer, each blend's extraction is carried out with different temperatures and timings in order to create a unique flavor profile.
You're absolutely right! Both plants are members of the
Cannabacae Family. Some hops varieties make this family bond extremely obvious in their flavor profiles! You really know your hops!
Cheers!