thats actually a really good question (i say that because i dont think a lot of people would compare the 2 but they are great for comparrison...) i have heard the 600, the 700, the 800 but NOT the 650. if the 650 are anything like the 700 or 600 then the 6xx are "better" then the shp9500, but by what percent? i would have to do a direct A/B between the two to find out. i think tonally they would be similar. the shp9500 is a really good heaphone for the price. but i felt like most cans above that price range lets say $200-300 range you go from sitting 10 rows back with the shp9500 to 4 rows back in the crowd with the more expensive. just my 2 cents....