Jersey is a segmented state that is night and day... which is why Jersey has difficulties creating an exclusive identity and why a 'Jersey' team is a hard sell.
North Jersey is very much NY... you'll get plenty of people to agree to that. Then you'll get those who argue it's not... but to outsiders, they appears as New Yorker's.
Anywhere from Trenton to Camden, etc is very much a Philly area. Again, you'll get those who say no... but to outsiders, they are very much Philly.
South Jersey is very... well... South Jersey. They either are seen as piney's or Philly transplants.
Central Jersey is a mix of all three... and there is always a disgareement of what exactly "Central" Jersey is... As both my parents and myself were born/raised in Toms River I knew this well... before I moved to Philly for college and stayed. Now I'm a weird Devils/Eagles/Mets fan. Although those were my teams before I got here... I blame my 3rd grade teacher's obsession with Randell Cunnigham for the birds