In terms of load progression leading to hypertrophy and strength gains, what is the difference between doing an HST type routine with progressive loads (starting from ~ 60%1RM) to a set maximum to be reached a some point in the cycle, vs. say progressing every 1-2 weeks on most/all lifts starting at your 5 rep max for example, increasing weight at +8 reps.

Is it mostly CNS issues or what? Which would be superior in gaining mass, strength? anecdotal evidence welcome.