Really! I have not tached both, but the Mac's DOES look smaller...I don't have any of the black Kyosho ones at all. Pretty sure they are available, though.
Right now I have a friend working on getting me two spare Toki pipes and one header, somehow I ended up missing some.
The LATEST toki pipe goes on weston-style, no coupler at all, but I only have one of those engines.