[xXOpkillerXx]

Considering that both are super tasty when done well with good ingredients (like freshly grated cheese and cut garlic for example), to me it comes down to which one is better on average and that's just bacon. Garlic bread can be very meh if the bread has become slightly too stale/hard. Also bacon has tons of uses so you could have bacon plenty of ways, whereas garlic bread is mostly just that, garlic bread.

And well given the lack of criteria of this poll/open ended question about "breakfast item" (although who tf eats garlic bread for breakfast smh), I'd say bagels are a pretty damn strong contender (especially one with smoked salmon, cream cheese and capers).