Did my comparative shavings over 2 days (wouldn't call it scientific but similar to method used when I had my internship with one of Gillette's competitors);
Day 1; Excel vs. Fusion (2 blades vs. 5 blades)
Day 2; Mach3 vs. Fusion (3 blades vs. 5 blades)
Split face in left side/right side, shaved only with grain, multiple strokes over the area until I felt there were no use in continuing, used Fusion gel for both types of blades. Rinsed face with cold water and "inspected" the shaved areas visually and by touch.
Day 1;
Excel side (right side); multiple nicks and slight bleeding, especially on area around adam's apple, significant amount of stubble when I stroked my hand against grain for inspection, especially around jaw, under chin, around adam's apple (in spite of the bleeding). Significant irritation/soreness.
At 7pm; Visible shade, great amount of stubbles on chin, under nose and below sideburns. Still sore/some redness, in particular on Excel side of adam's apple. Wife unhappy.
Fusion side (left side); no nicks, no bleeding, smooth shave, insignificant traces of stubble, couple of strains/stubbles just under nose and by the ear.
At 7pm; minimial shade, some indication of stubble but significantly less than Excel side. No irritation. Wife happy.
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Day 2;
Mach3 side (left side); no nicks or cuts in spite of shaving over the Excel area from day 1. Smooth shave, some stubble. Little to no irritation on neck area (my weak area of shaving). Again a couple of strain/stubbles by the ear.
At 7pm; some shade, some indication of stubble but slightly more than Mach3 side. No irritation. Wife happy.
Fusion side (right side); again no nicks, no bleeding, smooth shave, no strains/stubbles under nose and by the ear (paid attention this time!)
At 7pm; minimial shade, some indication of stubble but slightly less than Mach3 side. No irritation. Wife happy.
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Both Mach3 and Fusion have somewhat large cartridges with wide areas on the sides because of the way the blades are being held, forcing you to pay extra attention to those thight areas around your nose and along the ears. Both systems offer a nice, comfortable close shave but Fusion is slightly smoother and closer. Fusion has a better handle giving more control. The aloa strip on Fusion seems to work better and last longer, giving a smoother/slicker stroke and longer life to the cartridge.
Excel; your choice, but if you still use it, it is time to upgrade to at least Mach3!
Why use MS-DOS when you can use Win95 or XP and why buy Win95 when you can have XP?
My 2 cents in the shaving feud!