To answer your question directly, I'd take the Fazioli, sell it, buy a Steinway and pay off my house with the leftover money.
But seriously, I have listened to a lot of recordings and carefully listened to some Fazioli software pianos (one of the best way to evaluate piano sound by brand), and done the same with Steinway. I always like the sound of the latter better.
There's no question that Fazioli is a premium instrument, built to exceptional standards and sold for an exceptional price. And that it produces a clearer, less muddy tone, but the rich tone you are used to hearing on recordings is that of a Steinway (unless you are listening to pop, in which case it's a Yamaha). Possibly for that reason you may prefer the Steinway sound, as I do. Most of our ears are accustomed to hearing the Steinway sound.
To me Fazioli sounds quite bright, sterile, and even harsh by comparison. Basically everything you associate with clear, as opposed to muddy. Steinway's tone seems to me to be more versatile and rich.
Full disclosure: I have played plenty of Steinways in real life, but never a real life Fazioli.