Been searching quite a bit on this topic (blower is for residential use). All I can find is that the 350bt has a slightly nicer harness. Second, many people mention that the 350bt has lower MPH but higher CFM. However, according the Husq's own site, that isn't the case: 150bt http://www.husqvarna.com/us/products/blowers/150bt/ 710cfm (in housing) @ 251mph ?? - in pipe 350bt http://www.husqvarna.com/us/products/blowers/350bt/#specifications 692cfm (in housing) @ 180mph 494cfm - in pipe Can someone explain to me why the 350bt cost more or am I misreading the spec? Thanks in advance for any help!