Strength means nothing. A weight lifter is "stronger" than an MMA fighter.

But as to who would win in a fight, read Brothers in Blood and Battle for the Cowl.

Nightwing should be because he's been in the game longer than Jason but if there is ever a battle to the death then only one of them is willing to go the distance.

I think nightwing because of him being an acrobat. It takes a lot of strength to do what he does.

Nightwing may be stronger...

But Jason can't die. Although nightwing can still tire him out.

So I don't really know.

(I know I voted for Jason but that was just to get the post popular)

Although nightwing is stronger Jason would be a lot more willing to kill him

Yes

I think Jason lifts heavier than Dick but that means nothing really in a fight.