I love Highlander and consider myself lucky to have it on TV 3 times per day on the SPACE station. I was a little hesitant to watch Tracker, in case it wasn't as good as Highlander.
But, I am finding that I love Tracker, just in a different way than I love Highlander. They are very different. The tone is much lighter, and there is far more humor in Tracker. The only similarity, I think, is the attempt to develop strong characters and the development of the overall story, which links the episodes together. It keeps you guessing and wanting to tune in each week to see what they are going to come up with next.
The look of the show is very different. The action is also "alien" and not so tough and aggressive as Highlander. I do miss Duncan's sword work and graceful fighting style. However, the martial arts are quite good in Tracker, with more wire work. After all, these guys are aliens. I hear that Adrian's martial arts teacher (Vernon) has been in Toronto and they have developed a unique "alien" martial arts style for Tracker. Apparently we are supposed to see this new style show up in the up coming episodes.