Its a model name for a CPU and they have the same cores... so like [theoretically] a 1.8GHz core STOCK would be called 2500+ and a 2.1GHz core STOCK Speed would be called 3200+, I guess that software you have just overclocks you'r CPU from its stock speed to an equivlant speed of the 3200+ [BTW The speeds I presented are theoretical, I don't really remember the exact core speed of the 2500+ or the 3200+]
Example to compare:
Our nowdays Pentium D series,
We have the 920 and on up to 965... the 920 comes with a core speed [again theoretical speed, too lazy to check] of 2.5Ghz and the 940 comes with a core stock speed of 3.2GHz, overclock a Pentium D 920 from 2.5Ghz to 3.2GHz and you could call it a Pentium D 940, lol...
Whats the diffrence you ask then?[Guessing you'r not an experienced overclocker..] The diffrence is the price lol.. you paid for an AMD 2500+ and overclocked it to be same as 3200+, but for free
BTW I believe that even after using that software of you'rs that modifys you'r cpu clock to be same as a 3200+, if you download CPU-Z and open it, it will still show that you'r CPU model name is 2500+ ...