At Google you wait for a year, and then get stock vesting every month. I just treat it like monthly salary (and don't even pay too much attention to how much unvested stock I theoretically have: if I stay, they'll top it up anyway; if I leave it's gone.)

Yes, totally agree, if you want to compare numbers, you have to agree on what you compare.

In theory, we could just always talk about total compensation, and just plug in standard financial valuation models. (Those models would typically value startup equity at close to zero value---especially the kind of equity that tends to get horribly diluted.)