Progress Passes

[Nasa]

Hello All,

I was shaving tonight with my 34C and was wondering about an adjustable razor like the Progress. Can I do more passes with a Progress setting at #1 than with my 34C without any more irritation?

For example 3 passes with Progress at 1 is equal to 2 passes with 34C in terms of irritation.

I hope my question is clear?

What is the difference between adjustable? Progress vs Slim vs Fatboy vs etc, besides the vintage factor.

Thanks