I don't mean to lash out at you, but the Allen-Smart comparison I've been seeing every now and then is just...lazy.
The Allen comparison, I think, is mostly about what Smart is good at defensively and what he lacks on the offensive end. It doesn't have much at all to do with what Smart does well offensively or his actual skills and playstyle.
Like you said, it's lazy.
I like George Hill and Patrick Beverley a lot more as comparisons, if only because the role they play, in my view, is much more similar to what Smart does. Smart's bulk and strength sets him apart from those guys, though, which is where the TA comparison comes in.