Please share results & experiences with each program, in terms of:
1/ Short-term 4-12 weeks approx.
2/ Longer-term
3/ Results using it a second time, later after a break from it.
There are usually a number of different approaches that will work for anyone, once they've been discovered. Most don't try enough alternatives to find out all those that will work, are therefore limited in assumptions as to what works best.
A little experimentation involving trial & error of each program's a huge advantage. Another approach would be to slightly alter existing programs using personally appealing variations, then gauge which version works better after a reasonable trial period.
Another key is motivation-if two approaches work but one is much more appealing to do long-term, that's the one to use. The only caveat: there may be other approaches out there that are equally appealing that haven't yet been tried.
Volume as an example: moderate sets with more effective use of each set using higher intensity can be as or more effective, while still being similar enough to appeal to volume trainers. Some who've used volume might appreciate moderate volume even more because there's more intensity & workouts aren't as drawn-out. From experience, i can't say that standard volume proved any discernible advantage over moderate volume, was just more work and more time-consuming. Volume might help when refining for a contest.
Therefore:
1/ Try every system for a decent amount of time: 4-8 or 12 weeks.
2/ After using the basic version for a while, modify each program slightly, see what the effrects are.
3/ Keep the programs that work. Stick to one, or:
4/ Rotate the effective ones in and out over time using each equally, or:
5/ Retain one "core" program and provide occasional 4-6 week shocks by rotating in another program that has been found effective.
6/ Post detailed experiences/results here.