Gas or glow is a matter of opinion they are both good at certain things.

Glow fuel is better at

powering smaller planes
More powerful than gas per cc
simpler in construction
easier to tune ( if you know what your doing )
long life span ( I am still running a Super Tigre "X" RE that I purchased in the 70s )

Gas is better at

cheaper fuel
Fewer off season storage concerns ( No rusted bearings )
cleaner to operate, your plane isnt slick with oil after a flight.
powering planes over 15 lbs

I have flown both and far prefer the power to weight ratios of the Nitro glow engines. My planes fly better with nitro power plants. Gas just isnt there yet for me. Once the designs are brought up to todays glow fuel performance standards then maybe I would switch over to more gas engines but the gas designs we see for the most part are pretty dated. The new OS 55 gas engine is an example of what we need more of. Very nice engine indeed. For the most part I have .60 to 1.20 Nitro engines and am very happy with them. They are reliable, never dead stick and other than the fuel clean up, have for 30+ years been my engine of choice............ No reason to switch..........

103/17