Gifted One wrote:
Sorry I created your flame out. But I think that I did answer the OP, but with a cavoite.
I don't where you added anything.
JR
I wasn't calling you out personally. You were one of the few who actually did answer his question. I have little to add, since I have not compared the two. I do own the Tamron and have found it to do an excellent job for me, but that says nothing about whether is is a better choice than the comparable Sigma.