Some time ago, I made a post where I split a pork belly in half, cured it, and cold smoked half of it. i hot smoked the other half. The pictures in the post are gone. I'll try to find the time to find them on my computer and post them here, maybe tomorrow, but there are a few other things to tend to before christmas eve.
Cold smoked bacon tastes a bit more of meat than hot smoked bacon, and have a longer and a bit more complex aftertaste, in my opinion. This can of course vary, depending on the belly as well as the different smokes, choice of wood et ceterea.
I would not call smoking at 145f a cold smoke. For me that is a hot smoke, but that is just a matter of how you define your smokes. The bacon does not really care..