Six? Looking at the cinematic, it looks like two weeks, since it goes from the full moon to the waning crescent. Are you putting another month in there?
Sadly this is the only example we have seen of a blood transmission. And that appears to be the only difference, the speed at which the metamorphosis occurs.
In total, there are four ways to become a worgen,
- The Source
A druid takes wolf form and channels power from the Scythe of Elune, granting a quick but gradual and painful transformation (Alpha Prime, Curse of the Worgen).
- The Bite
A human or kaldorei is bitten by a worgen. When the curse was new, the bite’s effects were as quick and painful as using the Scythe. In modern times, it takes mere hours (Dark Riders) or up to three days of headaches (CotW) and growing fur from the wound (Starter Zone) before you finally change.
- Polymorph
A polymorph is placed on you by a mage or an enchanted item, turning you into a worgen. Or, the likeness of one anyways. It was in this way that Arugal placed the curse on the forsaken Apothecary Berard. He does the same to humans in the Grizzly Hills, who - unlike real worgen - become human again after they die.
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- The Blood
Drinking worgen blood, which appears to have immediate effects. After that, the Hillsbrad Refugees appear and act as worgen. Their dead remain in worgen form, they are immune to undeath, and feel the worgen rage. Some people theorize that the “cure” given to the Gilneans transfers as well, because the Hillsbrad Refugees appear sane. However, not only is the “cure” bogus (feral worgen are not mindless, and Gilneans still hunt) but Darius Crowley never did the ritual.
The only difference I know is the one you said, that they turn quickly, as if they had turned using the Scythe or the original bite. If I were to theorize as to why, I would guess a pint of blood in a cup has a higher concentration than the trace amount of saliva on fangs. Some also theorize that it is the symbolic act of drinking the blood that turns you, not the blood itself, therefore you cannot accidentally become a worgen by drinking something with worgen blood in it. However, given we have not seen an example of that, and blood curses can affect the unknowing and unwilling, this is likely in vein.
Get it?