Some say the leaves are different, some say no. Some say the cones look different, some say no. Personally, I gave up trying to identify the mystery rhizome someone gave me 2 years ago. Once you get familiar with the taste of your hop, it really doesn't matter what actual variety is anyway.
If you are unsure, I recommend making a SMaSH with a either 2-row or pilsner and a ton of your hops added fresh, and at the end of the boil. That will give you a good idea of what kind of hops they are and how well they grew under your conditions.