I am trying to choose between the following processors:

AMD Athlon™ II X2 250 (3.0GHz, 2MB)
AMD Athlon™ II X2 240 (2.8GHz, 2MB)
AMD Athlon™ II X2 215 (2.7GHz, 1MB)

There is a 20 dollar difference going from the 215 to the 240 and from the 240 to the 250. Is there going to be any difference between the 240 & 250? Thanks.