Bianchi used to be made in Italy but no longer. Like many manufacturer, they are mostly made in Taiwan. It's not a bad thing. Still a very good bike. Giant is also a very good bike. Giant size tend to run big. Rides well. Tarmac is probably the highest end on this group of three bikes.

I don't think you can go wrong with any of the bikes you've listed. If you have the strength and not doing a prolonged steep climb, go with regular chainring instead of compact double.

Most importantly, go for the fit and comfort. If you want to be a roadie, try all three bikes on a rough pavement and feel the vibration. See which one you like the best. Some prefer the softer ride, others prefer a stiffer frame for better power transfer. There is no right or wrong so go with how you feel on the bike. At 5' 5-1/2" you're pretty close to the dividing line between a small and medium size bike. Probably a 52cm-54cm frame will do. And probably get away using 172.5mm crank.

go to the bike shops and go for a spin 20minutes or more if you can.

Enjoy your test ride!!