I bought this with a view to get the external power supply later for easier speed change.
Sound wise I am sure it is better, but its hard to do a back to back comparison obviously.
Needs soldering to install, but it is straight forward enough.
Only dislike is the height adjustment, the motor mounts on double sided foam pads, and you just stick them together to get the height right.
It would have been nice to be ale to use the original screw fixing system, but perhaps this is a sound transmission issue.
overall great upgrade.