I'd expect that from whatever stock you purchase, you'd be purchasing the "best examples" that seed bank found. There could be a fair bit of difference from different stocks, depending on how much effort went into selections and possibly back crossing, or where they got their original seeds. But seeds from 1 stock
should be pretty consistant, if it is a true breed strain.
Hybrids are to often reputed to show more vigour in their growth, and sheer will to survive, than pure strains.
You may already be well aware of this, if so soz, but, Pure African sat's etc can (and usually do) grow obscenely tall. They take a lot care to perform well indoors. SCROG may be a way to go with such a strechy type.
There are some luverly unique highs/tastes/aromas to be found in the slightly different regional strains. These Natural strains need to be kept in existence, yea use them in breeding programs and see what comes up, but keep the pure varieties circulating round, so a good, solid base is always available for future breeding/cultivating.
Best of luck if you give it a whirl.