I just ported a 066BB last week. Here we have a new 460. The 066 was wearing an 8-pin and cut a 5.79 in this wood. This 460 was only wearing a 7-pin and cut a 5.89. I believe it would have been faster than the 066 with the 8-pin, but I was out of daylight. Until the wood gets significantly bigger, the 460 is a much better choice. This hold true for most of the 70cc-80cc saws. They turn more RPMs yet have plenty of grunt to back them up. The 460 is one of my favorite saws of all. Of course, if you're pulling a 36" bar, or longer, go with the 066/660.
Here's the 460.
[video=youtube_share;is1o9CCusR0]http://youtu.be/is1o9CCusR0[/video]
Here's the 460.
[video=youtube_share;is1o9CCusR0]http://youtu.be/is1o9CCusR0[/video]