q9500 vs q9505

Q9505 --> release date Q3 2009 Q9500 --> release date Q1 2010 in cpuuserbenchmark it shows that the Q9500 is 1% better than the Q9505 is it true : https://cpu.userbenchmark.com/Compare/Intel-Core2-Quad-Q9505-vs-Intel-Core2-Quad-Q9500/m3041vsm1778 i don't know which one to buy Q9500 for $17...