Usually a Day Rover seems better value than a Transfare.
Go North East is £4.40 for all zones (so £8.80 in total) and £3.70 for two zones (so £7.40 in total). A Day Rover is only £7.20 and going up to £7.50 for unlimited Tyne & Wear travel.
I didn't know the price varied by operator. I can get Stagecoach, GNE or Stanley Travel (Nexus) between home and the City Centre and the Metro to and from Jarrow (for example) or get the Metro between Kingston Park and the City Centre and GNE 26/27 to/from Jarrow.
RE: Pricing