Bit of a lottery on most of them I expect.
Well your all a bit useless then aren't you Truth be told it's not massively different from the regular E01's I've had, just a fair bit more of a yellow tinge
Yes, as others have stated, it's a simple tint lottery. I bought an E01 right when they were released to the public that has the warmer corona like you describe. All others I've seen since have the nasty purple. I like the warmer one!
Here is a link to a post on CPF showing 5 different tints of E01:http://www.candlepowerforums.com/vb/showpost.php?p=3579106&postcount=10