Connie, it's a great idea to just do the research on both places to get a feel for which may appeal most to you. Whichever one that is, I'd give it a FULL day and not split your time between the two. Both have plenty to offer depending on your interests, and while the easiest option would just be to stay in Gent, Bruges is close enough by train not to have to spend oodles of time in transport.
Regarding Bruges, while the Markt And Burg (squares) are impressive (and draw the hordes) some of the more interesting attractions are in other areas. Sint-Janshospitaal, for instance, has a long, long history and contains some wonderful pieces by Hans Memling: a master of Flemish Primitives and largely considered 2nd only to Jan van Eyck, both of them longtime citizens of Bruges.
Additionally, the Groeninge Museum has a great collection of Flemish Primitives, including Memling, van Eyck, David, plus other works. We thought Jeruzalemkapel - a 15th century chapel built by one of the towns wealthiest merchant families - was fascinating and especially so as it, along with the estate, is still in that family 17 generations later: the current Count just happened to be manning the ticket window the day we visited! Anyway, lots of interesting things to explore...
As it might be helpful, this is the tourism website for Bruges:
Jeruzalemkapel'a own website:
And Gent, which we day tripped and will spend a couple of days in next time: very nice city. You might enjoy Gravensteen Castle (Castle of the Counts) along with the must-do visit to St Bavo's?
Oh, and street food? Frites with mayo and waffles (eaten as a snack in Belgium). YUM!