RE: BALSA is better than SPAD ?
I built all of my (first 3 planes) that I used to fly on before sims, buddy cords, arfs, spads, or monokote even existed
Don't do it...your wasting money, time, and effort.
Now that those things exist----use them. Why do they exist because they work!!
....ignore the old fooggies who think they know it all. Use a sim as much as you can, use a buddy cord with an instructor, build an arf or buy/build a spad, better yet, buy a used plane that someone else doesn't want anymore on the cheap. Eventually the old fooggies will all die off and we won't have to listen to them anymore.