I've heard a lot about anesthesia ? What breeder is it from?
phenos?
Anyone?
Its from Sannies.
This one is on my "list", but haven't tried it yet.
FWIW this one is an F1 between an old clone only Afghani-Skunk cross and Sannies Herijuana.
Supposedly it has two phenos, one of which is a little more like herijuana then the other.
Both are good, and people do like this one for medical use.
Jogro.
do you prefer green crack or Williams? I've heard great things about both.
yield? Quality?
Anything you could possibly want to know about either strain is included in the two separate grow reports in my signature, including pictures of veg through flowering, buds, and smoke reports. If you're serious about these two, I'd say its well worth the 10-15 minutes necessary to check them out.
Here's the quick summary:
Green Crack S1: 50-55 day harvest, awesome fruity mango scent and taste, cool purple color for high bag appeal, moderate-high potency, average yield, racy/sativa high. Note that I've never grown the true "clone only" Green Crack, just the Sickmeds S1 version, which throws off different phenos.
Williams Wonder: 63-67 day harvest, OK but slightly unusual scent and taste (sort of a floral-citrus-weed scent), high bud density, high yield, high potency, couchlock type indica "stone" effect, somewhat hermie prone during last few weeks of flowering, high odor during flowering (!), stable strain (little plant to plant variation).
So really, these are quite different animals.
To answer your specific question, since I'm mostly a medical user, my personal preference is for the pure indica, Williams Wonder. Williams Wonder used to be a "cash cropper" because of high yields and potency, and its also well suited for SOG type single cola grows.
Green crack stands just fine on its own, and it has more "bag appeal" because of the scent and coloration but I think of that one more as "party" weed, rather than "medical". If you can get your hands on a cut of the clone only version, that's probably a better place to start, but I think there are good phenos of this S1 that can be had with a bit of selection.