I actually have one of each, though my G-62 is an older model that came with the right angle throttle arm. Never took either apart (luckily have not had a need to!), but to date both have been very reliable and about the same power (much more time on the Zenoah so far). However my BT-64 will turn a Mejzlick (sp?) 22 x 10 over 7.2 K (Amzoil 100:1)...just for a different prop to compare to.

For me, the G-62 is much easier to prime with the choke on (it draws fuel up better), but I never was able to start the G-62 by hand (I use a recoil starter for it). The BT-64 takes longer to get fuel to the carb, but can easily be flooded (almost impossible to get the G-62 TOO wet!) when starting. The BT-64 hand starts EASILY once properly choked.

My (older model) G-62 came with a worthless motor mount that required an aftermarket mount. It also required a right angle throttle arm adapter (something I guess the newer ones do NOT need), and had a hugh, heavy muffler that wouldn't fit inside the cowl of most planes. My BT-64 came with an entirely workable motor mount (no aftermarket mount required), and a muffler that I was able to use inside the cowl (with some reworking) of my WH 28% Edge. I also did not have to resort to a recoil starter for my BT-64.

With all that said, I would agree that my G-62 just "feels" more robust than my BT-64, but I realize that is a pretty subjective analysis. I guess only time will tell on the longevity part!

Lee