I dig Chris Brooks’ distillation of the core biomechanics in a very efficient way - you can get started right away with tremolo picking and single string licks, then progress to string changing scales and full runs. His development studies are also superb. I think I’ve copped most of his educational material - Chris is a great teacher and player.
Compared with Troy, the educational approach is more focused on Practice and learning phrases (and the concepts behind them) - less on in-depth analysis of the playing mechanics. The Yng Way video course is great - and the Neoclassical book offers a lot more detail and more exercises.
He was formulating these ideas probably at the same time Troy was, from studying Yngwie’s playing up close. I don’t think there’s much influence outside of a mutual interest in the Viking.