Vacuums systems are great for avoiding track marks, but can you define what you mean by a more even cut?
Vacuum clipping systems generally mean that it cuts off more hair then it usually would (by one to two blade sizes) and you can grab hair that you don't mean to grab which means you have to be careful. (This is why there is big learning process with it!)
If you want to learn more about vacuum clipping I really suggest one of the grooming forums (like
GroomerTALK and MobileGroomerTALK Community). There are a lot of groomers out there with a lot of experience out there who could really help.
Also, really do your research because there are several lines of vacuum systems and they all have pros/cons.