Hello wise sages and gurus of the iron dungeons.

As a natty, ive been told to keep reps from 6-8 and train my heaviest each set.

As of now i follow more of a 12-10-8-8 rep and set scheme where i go moderate weight for 12-10 and heaviest for 8 reps for 2 sets. I might follow with a drop set of 10 reps.

Is this wrong? Should i do something like warmup/8/6/6 or 8 8 6?
Does it really make a difference
Considering i go to failure on my last 2 sets?

If im stimulating the muscles to the point of failure , whats the difference if i do it with less reps and more weight? I still go to failure ya know?