Had winters for the last 10 years - a must for me regardless of 'how much snow' - it's not about that, it's about grip and the science of rubber compounds in low temperatures - if you're in the car a lot, it makes sense to ensure that the thing between you and the road is performing as optimally as possible. On RWD Beemers, they definitely helped - there will always be a point they can't handle, esp in auto but those times are v few and far between. Not had a winter with the Giulia yet but can't imagine it being too different an experience. If anything, with the paddles, it should yield more control?
Do get a separate set of rims too though, not just tyres - learnt that lesson - taking them on and off either damaged the tyres and\or alloy or both.