I promised I'd post back on the results, so here are some preliminary results. After about 3-4 weeks bottle conditioning I had my son, my wife, and myself take comparison tastes of the three different beers. As a recap, I prepared a porter wort, then split the wort into three small batch fermenters with three different yeasts: Safale-04 (1 1/2 gal), Safale-05 (1 1/2 gal), and Safbrew-33 (2 gal). All were very active and I probably should have attached blow-off tubes, but I'm still acquiring basic equipment. Nevertheless, all produced drinkable brews. The 04 and 05 were very close in taste. My wife and I thought the 04 might have left a bit of an unpleasant after taste. The 33 was a bit sweeter then either of the other two. My son thought the 04 had a more 'rounded' taste, but the 05 (his fav) was more of what he thought a porter should be. My fav was the 33. While it was a bit sweeter by comparison, it wasn't a sweet beverage. I thought the balance was more to my liking. I'm out of town for a few weeks and I look forward to sampling again after some more bottle conditioning.