ya the one in the bottom pic looks much darker but it doesnt look completely + yet...OPKs are hard b/c the test line has to be exactly has dark as the control line or even darker...its super annoying but i think maybe if you take another OPK later at nite or in the morning maybe it might be + just start BDing just incase you might be Oing soon

OPKs say you should be Oing in 12-48 hrs....according to the instructions ....soo good luck! have fun