In 2000, the PS2 only sold for one month in Eurpoe, Two months in the US and 9 months in Japan. And it was pretty much supply contrained the whole time.
In 2007, the PS3 sold for 12 months in the US and Japan and 9 months in Europe. And supply was plentiful the whole time.
To compare the two is cherry picking at its finest and makes the analysis a complete joke. Any rational person would be ashamed to make such a comparison.