Yeah it is definitely different but the same too. It doesn't read too much like a personal journal, more like an interpretation of the world. Alot of stuff he learned from different musicians in europe and america. Some theories but alot more open than most of the text books of today. Like voicings, it does quote on the augmented fourth as being a interval that can be better voiced, and avoided being another solution is possible. The same with parallel octaves and fifths in voicings, there is usually a better voicing to be found. Although if the answer is unpleasant in context, parallel voices are ok. Alot of the ideas in it are more about options rather than restrictions. I think it's because alot of text books on music theory are based from the theorist perspective. He wrote from the musicians, which is the biggest difference. Then theres stuff on composition, orchrestation, and some other things. Your pretty lucky to know someone who has had the same type of experience. Not only are things different in time, but different places of the world have different and unique ideas.