'accelerated vesting'.
Keeping employers honest with a contract in place is a lot easier than without.
Anyway, you seem to be stuck on this being equal so I have no illusions I'll be able to convince you of the differences.
It's not strictly equal, and true, accelerated vesting is a factor.
Just attempting to make the point that one should not take too much comfort in any options package before he/she is over the cliff and unless he/she has seen the cap table.
If you don't trust the employer, don't work there.