MAD is wacky. This is more England and it's casual gutter talk. All cultures have their own. Do you enjoy any British hum(o)ur?

VIZ is crass, puerile in the extreme, casually (insert your red line here)-ist on many levels, and often repetitive. It uses common slang words, so somewhat culturally revealing. It's 'wrong' on many levels but done with style, albeit sometimes a repugnant style - So you inwardly 'gasp' in revulsion but outwardly stifle a giggle.

The fake small ads are often very very funny.

Lastly, like so many gags that use the 'shock' effect, the humour doesn't last forever; take a look at an early one on Archive...