No, theres a lot more to it.
First off, bi-amping. Rather than one amp driving both speakers, you have two individual amp channels. That means one doesn't interfere with the other. Eliminates problems such as the woofer eating up the tweeter's headroom. Much lower distortion at a given amount of power and greatly reduced phase shifting. Phase shifts even in an expensive passive system are problematic making it impossible to get a near-perfect sound stage.
You're splitting a low-current line rather that a high-current line, that's like splitting a little stream in two opposed to perfectly trying to split a big river in two flows.
On top of that a very inexpensive active crossover will outperform a passive one no matter what the cost. The passive 20/20s would have to cost many thousands of dollars to even come close to the performance of the actives.
There's quite a bit more to active crossovers. The amp has direct contact with an individual driver, that can lead to a virtually infinite amount of possibilities, which many companies have taken advantage of. God forbid a passive system had things such as an output limiter in a high-current line.
Perhaps some people won't notice a critical difference, I don't know but what I do know is I can't stand any passive system I have heard to date, even the classic signature titans after hearing things such as the YSMs or similar monitors.