Mics ARE like Horseshoes and Hand Grenades.
Closest to the pin (highest SPL at the element) wins.
The OM7 and Telefunken M80 work on really loud stages. But mainly because the element is (apparently) closer. They sound great most of the time, but are a problem for folks that have not "practiced" singing into them. They won't help a no-pipes singer on a loud stage.
- But the louder the stage - the more clueless the performer - and the less likely I am to bring out anything other than my cheapest, smelly, bent-up mics. So they get a 58.