I raced my 93 polaris indy 440 liquid cooled 2-up versus a 97 polaris indy trail 500 2-up. We did multiple runs ( best out of 10 ) and i won by 6 races. It turned out basically whoever had the best start would win, each race either of us won by 1-2 sleds but my sled seemed to kick out more power in the high ends where as his would have more in the low rpms. Anyways they are just about equal. It was fun 