I am going for the visit! Really excited to see what the department and city are like.
I have LOTS of factors but the primary is that my main AOI is Early Modern, and Toronto's EM faculty are kickass, and there's so many of them (Donald Ainslie, Marleen Rozemond, Karolina Hubner, Nick Stang... heck even Sergio Tenenbaum and Arthur Ripstein work in or around my AOI). The only person to really supervise an Early Modern project at Pittsburgh seems to be Engstrom, who seems really good but that is sort of limiting as I am still not sure what exactly I want to work on. I also applied and was accepted to Law at Toronto, and the joint JD/PhD program is really enticing.
On the other hand, I am interested in lots of different areas not confined to Early Modern philosophy, and Pittsburgh does have a really amazing overall faculty, and would probably be a 'smarter' choice strategically as far as job prospects down the line. I also did my MA at Toronto, so some diversity of perspectives would be nice too (EDIT: though half my profs did their PhDs at Pittsburgh, so maybe it won't be that diverse after all...).