Shaving iritation

I use the term because I don't find ‘mild' or ‘aggressive' useful. If I have a Gillette Tech that gives me a decent shave with a Personna Israeli Red in 3 passes; and I get a BBS from a MÜHLE R41, or Gillette Old using the same blade in 2 passes, then the latter is more efficient. To me, anyway. Vive la difference, etc.
 
I prefer the word assertive over aggressive, some dogs are aggressive but razors are generally well behaved! Efficient is also a great discripive word but as you say vive la difference P.