Ah well...I'm half Manc, half Geordie with a grandad from Lincoln and a grandad from Yorkshire. I'm as Northern as it gets and I can tell you Geordie is nothing like Yorkie. It's probably one of the more impenetrable dialects.
Yorkie is by far the funniest though, I love the clusters of words you can create to mentally wreck someone.
"You can't do that there here, anywhere else you can do that there but you can't do that there here."
Manc is my favourite though. There is no accent like it for swearing like a sailor. It's the wrecking ball of English accents, it's at the cutting edge of tech as far as accents are concerned. You need few words in a Manc accent to fill someone's keks.
I live down south now and listening to southerners attempt sweary angry outbursts is weak.
"You fackin cant"
"You fackin startin mate? You orfter a foight?"
It's like listening to a pair of foxes shagging.