An amp and passive speakers are not the same as active speakers. An active two way speaker has TWO amps, one amp for the tweeter and one for the woofer and a crossover not powered by the amp. This design allows the amp to be perfectly matched to each driver, plus an electronic crossover that won't change characteristics as it heats up like many do. Also, the crossover is not taking 30-60% of the power coming from the amp. The drivers have a faster attack since some of the power isn't lost powering the crossover and they are directly driven by the amp. Active speakers have advantages over passives even if they have the same drivers and crossover. Passives main advantage is cost and convenience.
With that being said I'd take a well designed passive speaker and amp over a poorly designed active speaker. But if all else is equal active beats passive. The Focals are not poorly designed and no matter whether you choose the Solo or Twin, I bet you'll be happy. And if you are not I'd look at fixing problems in your room:eek: Either is a great speaker with fantastic imaging, soundstage and depth.