Originally Posted by BendtheBar
Progression builds muscle, regardless of rep ranges - as long as they are reasonable ranges. With that said, I do not generally advocate under 5 rep sets for intermediate and lower lifters. They need reps, time under tension and form practice too.
Your second question...they are the same thing. Not sure if I am understanding you correctly. Perhaps you can give me some number examples.
Like some of these guys in the nfl combine can rep 225 for 40 reps. Would you say that is stronger than having a 1RM of like 405?