Originally Posted by B-Hoppy
If you have no other fresh hops to compare them with it's probably gonna be kind of difficult. Make sure they're ripe then take a few and crush, rub and sniff to get an idea of the aroma. Again, without other fresh hops to compare against it's tuff as a fresh cone will smell a little different than it's dried counterpart that you may have in the freezer. You could also take a look at the overall cone structure, sidearm length and general vigor to help narrow it down a little but it's gonna be tough. When all else fails you can always have another beer.
The only sure way is to send it to Hop Union to be analyzed.
I can not tell the difference between Chinook and Cascades by the smell test or the difference between Tettnanger and Fuggles.
Better to buy some rhizomes, then you will know for sure...