Sounds like you're making the better decision. I sent your post to my husband to get his opinion. Here it is.

Not even in the same league with each other. The Bianchi is hands down a better group of components and sounds like a nicer aluminum composition/lightweight performance frame. 7000 series is nice enough.

105 is "ok" from Shimano, but it's great if that's what they can afford. It's better than Tiagra also by shimano - which at first glance doesn't look any different - avoid those. The "Look" pedals are ALL very nice. They start out as very nice and go up to amazing-insane - so can't go wrong there. Crank Brother's however - more known for a good mountain bike pedal maker - not road.