I've done a billion searches, and I haven't found anything that pits these two head to head. There's a ton of information regarding the FX730 vs the Vanguard 810, but this is specifically regarding the EFI 730 and the carbed 810. Application is a 60" deck, if that affects anyone's opinion of which would be preferred. Most of what I'm reading seems to indicate a strong preference for EFI these days, but I'm curious if that holds true despite an 84cc displacement difference. Fuel economy is obviously a no brainer win for the Kawi, but can the 730 EFI perform as well as an 810? Is it susceptible to the same failures many complain about in the rest of the 730 series? Which of the two is likely to be cheaper and easier to maintain over time? This is primarily a head to head engine question, so hopefully it's appropriate here even though I'm not a pro.