Originally Posted by Cellarbrau
Um... you got me. A brewer in the UK told me so.
I think the US-05 being from chico is pretty well established.
I have heard over and over that the strain is of the same origin, but at this point for them to be identical would be a stretch. WLP001 for instance probably wouldn't do too well at 60°F. However, I am unfamiliar with the Wyeast 1056 version which is supposed to be the same exact strain (over a dollar more in my area, so I opt for the WLP version [having said that, I used dry yeast fro my last brew day because I did not have time to make a starter before brewing].)
I have a split batch in the ferm chamber now with US-05 in one, and Notty in the other.
I could make a 3 gallon batch and split it using WLP001, Wyeast 1056, and US-05. I would end up with a very slightly, yet close variation, but not exactly the same. Although a very sensitive palette would be necessary to distinguish the nuances; the three beers would be different in their own.
I'm not trying to get into an argument, I am simply stating that each yeast brand is different (ever so slightly) which allows brewers even more diversity and options on brew day.
Many yeast strains may derive from a similar source, yet they have mutated into their own opposed to their origin. It can be easy to say that they are the "same" while indeed they may be "similar," but they are different.