@BTB, the last paragraph threw me for a loop...hahaha
In my experience, I found that both styles work well for MYSELF, but not well for others and this could according to a person's strength levels, injuries, and whatnot. Example, I have a client who responds well to this format (ex.135x5, 135x5, 145x5, 145x5, 155x5) still a 5x5 but with progression. Also I have a client that responds better to just 135x5x5 across the board.
Basically, I agree with Hazz, Rich, and BTB
Each style has it's purpose in the long run and it works well to just switch from time to time.