There are those that believe in the super tiger engine just as much as those that love the OS. There do seem to be more OS followers out there though. My personal experience is when I first learned to fly I had a Sig Cadet MkII with a Como .40. I was told at the time that Como was made by super tiger. My problem was when it run, it run great. Some days you just couldn't get it to run for no aparent reason at all. My next engine was an OS .61 and I never had a problem with it.