I agree that its not rocket science but its amazing how ignorant a lot of people want to be. All of the local rentals will supply you with gas as part of renting a two stroke engine from them. The tanks all have the mix ratio emblazoned on them and the rental person always explains how to mix fresh gas.They will even give you more gas if you use the first batch up. They still have people blowing engines because they thought you "just needed to put gas in".
2 stroke engines are mechanically simpler than 4 stroke and can be very reliable. However they, like any other machine, must be made with a proper design and good materials. They must also be maintained properly. If you do that they will work well for many years of normal, household use.
I tend to think that 4 stroke is a better way to go, particularly from the enviromental point of view. It does seem that the manufacturers are moving that way. Personally I use both and both work very well and have been quite reliable. I guess it depends on local conditions as well as personal experience.
Now, looking at the original topic it asks which cuts better. I think the answer from a cutting point of view is that they both cut the same ( little string goes round, grass falls over
). The other considerations have to do with reliability, enviromental damage, ease of maintenance, ease of fueling and personal preference and experience.