Hey buddy, I think everyone here knows about your 2.4 GPA ( you've mentioned it in 99.9% of the threads you posted).
It seems that you are going to keep posting and asking the same question until you find an answer you like.
You are in a tough situation. Your chances depend on YOU!. Do the best that you can in BOTH NBDE1/2, work as an assistant ( you will gaining experience on the ways things are done here ), build up a good resume, and do a kickass SOP.
After that start applying to programs. In my opinion, by doing both nbde's will make you more competitive and might overshadow your gpa a bit.
Hope you consider my advice. If you don't, well I guess I will see a gazillion posts from you stating that " I have a 2.4 gpa and where are my chances getting into _______"
P.S.
I have a friend that got into NYU with a 2.4 gpa ( nothing is impossible 🙂)