Sat Dec 17, 2011 2:48 pm
Dry yeasts don't need a starter, and they are cheaper.
There are fewer strains of dry yeast, as well, so as long as there's a good dry yeast that fits the flavor profile you are looking for, the dry yeasts are a great choice.
For the liquid yeasts, if you are making a starter, there's no difference except for the subtleties of the strains themselves.
Some strains, such as Wyeast 3068, the subtleties are not reproducible in any other strain.
Likewise, White Labs WLP007 is said to be the same as Wyeast 1098, but I find 007 to typically finish cleaner and drier, while 1098 seems to finish a little more estery and sweeter. I find a similar trait with WLP001 vs Wyeast 1056, where sometimes 001 is almost too clean. Both are great, but the very subtle differences are noticeable and so depending on how you want to fine-tune the flavor profile, one strain may be a little better than the other.
Bottom line, the differences are in the subtleties.
-B'Dawg
BJCP GM3 Judge & Mead
"Lunch Meat. It's an acquired taste....." -- Mylo