ORIGINAL: a1pcfixer
Weak argument when comparing a DLE20 to similar glows (1.20).
That DLE20 is somewhere between a glow 1.20 -to- 1.50 for output.
Weight differences are negated when you consider the DLE20 needs only about half the size tank the similar sized glow requires.
Add in the fact the DLE20 can swing a 18 x 6 prop (but does best on a Vess 17 x 6), and the thrust figures easily favor the DLE20.
If bragging rights of high rpm is your thing, stick with a glow.
If thrust/torque and overall economy mean more, go with the DLE20.
Swinging a big prop nor even thrust is the same as power. Thrust on the ground is only important for 3D. Power is more thrust at speed. A 1.2 glow engine on average will have more power even if the gas has more thrust.