>60/40 isn't measurable, but if you know you're providing more value than the other founder, it's going to be close enough...
The problem, of course, is that you have to convince the other founder that you're doing 50% more, will always do 50% more, and should get 50% more equity, without poisoning the working relationship.
The problem, of course, is that you have to convince the other founder that you're doing 50% more, will always do 50% more, and should get 50% more equity, without poisoning the working relationship.