Relative to mach3 (3 blades) there is a difference especially comfort. This is the problem, the price seems exorbitant, but as we tasted it it is difficult to return to a range below.
Please note dated May 16, 2015, we still find on amazon more razor blades 27 9 Flexball. 3 or the blade, against 3.33 this pack for simple mergers. The Flexball being a range above and the razor is provided.
It will be more the case the day you read this comment.