i have both and prefer the clarks over the sidewinder because the healet lines looks better for me and its hurts less i hear a lot from my clients - bad is the brushless have some starting issue and a very small power range ...the motor is running very slow (to slow) or very very fast ...and to do business with john is a pain. After tying to get a new part thats broken and he always post he send a new for free i get a mail i can use glue. its dont work and after 3 month i have now found a cnc worker thats make me the part new. but The machines are very nice from john but service and quality is top from dan and the new sidewinder v2.5 or 3 are top liners for bold and not back heavy ,thats only on the old version.