My feeling is this is a separate team as it's in the end hosted on hire.withgoogle.com. Probably the team got acquired and it was initially run as an experiment. Anyway, this is just an assumption.
The tool is quite good and the price is not that high compared to others. It's like an add-on on top of G Suite compared to the built-in apps, but has pretty tight integration with GMail and Calendar.
You can configure it quite a bit and the only thing that seems to be inherited from Google own hiring practices is the interview scheduling where X number of people would do back-to-back interviews with the candidate. But this could also be worked around if not needed.
One thing which is a weak spot is the careers iframe you can embed. They also provide a JSON feed so you can render yourself, but the built-in rendering is so basic they basically force you not to use it.
Overall, we're pretty happy with it for the couple of months we've used it and it certainly is neither a blocker or an enabler of bad hiring practices as mentioned in some of the other comments.