For me I found that I get much less razor burn with a safety razor. Whenever I shaved with a Mach 3 or another 3 blade cartridge razor, I would always get razor

For me I found that I get much less razor burn with a safety razor. Whenever I shaved with a Mach 3 or another 3 blade cartridge razor, I would always get razor burn on my neck from the two additional blades. Never had that issue with a safety razor.