Yes. I used to have trouble telling N-1 apart from N-2. However, this description provided by a knowledgeable collector is really useful: "The N-2 has obverse strong inner circle. The reverse has style 2 letters and point of leaf under F is center of upright. The N-1 has no inner circle. The reverse has style 1 letters (1820 and before) and point of leaf under F is under left edge of the foot". Four of the examples in my collection are N-2's, only one is N-1. I guess that says something about which variety is scarcer.
According to John Wright in his excellent work, The Cent Book, 1816 - 1839, the 1821 N-1 is an "R-1+" and the N-2 is an R-1. That means he rates both of them as "common," but the N-1 is a little scarcer.
