Looking at the geometry charts, it seems like they're two pretty different bikes. The Blur XC seems like it has a much tighter geometry (74 STA, 71 HTA) than the slacker Yeti (71.5 STA, 68 HTA). The Blur is designed for a 100mm fork vs. the 150 mm fork for the 575. Similar differences in rear wheel travel as well...

Like CrazyCanuck said, the 575 would be way too much travel in my area, unless I drove up to the mountains. Do you need a XC bike or a trail bike?

IMO, they're both really nice bikes, and it should come down to which meets your needs better. Do you have the opportunity to test ride them?