Quoted from nikpinball:
I own yukon special and used to own yukon u.s. the European version is way better. It's more of a long target game that you can skillfully aim and shoot and advance play. The center bumper on the US version just ruins that and makes you shoot for action and just hope you hit the targets on the reels
I should try Yukon Special before passing judgment... but the smaller 2" flippers, removed middle pop-up post, only two kickouts, and plain 1-2-3-4 sequential slot machine numbers instead of colorful icons didn't look as interesting as the more common 5-bumper layout w/more random wins and scoring.
Hmmmm... will have to find this one and try it somewhere...