OK, so first of all: the comic is adorable. Certainly my top five ever in that respect. I kinda needed that with the week I'm having. I love Bubbles' expression when she says the "you're beautiful" line. I'm a bit sad for her (at least for now), because I think Faye does not register an AI in a robotic body as a possible romantic partner, and she's being somewhat oblivious. But I expected once she has a "oooooooooh!" moment, Faye might react positively, so I await that possibly happening. If that happens, I will squee at frequencies only dogs can hear.
Secondly: I know this is a universe with super-advanced technology, but I wonder how the chemical sensors that serve as "smell" work for AI. The human olfactory sense is very complex and (despite the popular wisdom claiming otherwise, mostly because we tend to compare humans to animals whose sense of smell is EVEN better than ours) incredibly sensitive and fine-tuned to many different substances. My mother is a chemist by education and she tested food for a living, for some time. Her claim is that a human smell or taste (if it isn't dulled by regular smoking and the like) can actually detect much smaller traces of certain substances, if you're trained for that, than many simple chemical tests. In fact, in some cases only a rather expensive and complex (and somewhat time-consuming) analysis yields more precise results for certain substances than human senses.
Granted, that was a couple of decades ago, but while technology may progress fast, it doesn't progress SO fast that I'd believe it would make a huge jump in that respect.
Since I see no reason to disbelieve my mother's experience, technology that'd provide instant recognition of smells an order of magnitude better than a human nose's would be rather impressive indeed. I'd personally peg that as much more impressive than stuff like artificial muscle/bodies.
EDIT: now that I think about it, it's perfectly possible that AI bodies feel certain smells much more strongly than humans, and certain smells weakly or not at all. It would be very difficult to notice this difference in most everyday situations, I imagine. Say, if a human and an AI had a completely different subjective experience of the same smell due to registering different chemical components, it would not likely come up in conversation, unless a human and an AI were comparing two smells ("what do you MEAN those two smell alike?").