AMD Athlon 64 X2 4800+/5000+ For Socket AM2

"In this article we'll review another two AMD Socket AM2 processors: Athlon 64 X2 5000+ and Athlon 64 X2 4800+. These are rather interesting because the former has performance rating higher by 200 points due to its 2.6GHz clock rate versus 2.4GHz clock rate of the latter. But the latter has 2MB L2 cache, which is twice as capacious comparing to that of 5000+! So, the main question is: is it justified to increase performance rating by 200 points only because the clock rate is higher? Especially, if that is accompanied by halving L2 cache?"