I’m late to this thread but I have gone through it and still confused.
I'm a beginner and haven’t done my A cert yet but it was the sound of combustion aeroplane that triggered that bug in me.
If I ask something stupid, please ignore it as I’m still a beginner and I’m aware I’m asking a lot of questions.

I want to know the comparison between 2 stroke nitro, 4 stroke nitro, 2 stroke gasser and 4 stroke gasser.

The information that I would like is

• what type of fuel or fuel mix
• the ‘cool or the sound’ factor (after all this is the original cause of all ills)
• mess that it creates
• Maintainence
• original purchase cost is less of an issue but maintenance effort and cost is
• and which brand is better

And if someone can also do a comparison on these lines between

• 2 stroke nitro with 4 stroke nitro
• 2 stroke nitro And 2 stroke gasser
• 2 stroke nitro and 4 stroke gasser
• 4 stroke nitro and 2 stroke gasser
• 4 stroke nitro and 4 stroke gasser
• 2 stroke gasser and 4 stroke gasser (I want this the most)

Many thanks in advance