Get the Bianchi, because I don't like those other brands.
As for boutique, well, usage-wise, it means very little other than purposefully distinctive and not mass-market. Or at least that's the idea. Plenty of businesses promote themselves or develop reputations as 'boutique' while simultaneously jumping on some style bandwagon and trying to capture as much of the market as possible.
I think it's funny how it's essentially the same word as 'bodega,' only French instead of Spanish - a little shop. How smug would people be saying their bike is a 'bodega' label bike? How eager would they be to book a stay at a 'bodega' hotel? As a euphemism for something that doesn't need one, it's eye-roll-inducing, like 'faux' instead of 'imitation'