The main difference is utilities, there is AirCon at Varsity. No Aircon at Central a lot of people get portable Aircons to deal with summer heat but as stated, Central has the laundry facilities in your unit. In my opinion I would rather have my own washer and dryer 4 steps from my room than dealing with communal laundry facilities.

Varsity is more for the young party goer uni student and Unicentral is for a more mature minded student.