Bat and the Bird Boys.
A re-imagining of classic characters. Costumes are made to look more tactical, militaristic, home-made, hooligan, raw, etc.
View Tactical Joker here: [link]
Batman is a lone hero with access to military equipment. His gear is a bit more classic and bulky because he is older and more militaristic. He works alone but comes across a duo of hooligans.
Nightwing and Robin are more sleek. They could even be vigilante brothers/building jumpers/hooligans. Their gear is a bit more modern "looking" than Batman's, but not necessarily better quality seeing as they would be wearing under armor/bulletproof vests/etc. and Batman gets the expensive military stuff.
It's the idea that Batman didn't create these two, they exist on their own and sometimes cross paths/help Batman.