your post caught my eye because i "hope" (although it would be rather hard) to be in your position. i also was accepted to columbia for the FNP specialty and am waiting to hear from johns hopkins regarding the accelerated BS-MSN program also with the FNP specialty. i interviewed in person in late january and haven't heard yet. can i ask when you interviewed?
getting into hopkins would obviously give me options (i only applied to 3 schools) and at this point, i think i am leaning towards going there if they accept me. they're both highly reputable programs, especially in FNP, and really, i don't think it will be a decision that we will come to regret hugely when one school is chosen. the programs are similar so i think it comes down to location, cost to a certain extent (both programs are pretty expensive), and the feel you get from the school/staff which is obviously pretty subjective. i visited columbia this time last year so it's been a while but knowing alumni of hopkins and having attended 2 of their info sessions, i feel like hopkins might be a better fit for me.
i'm looking forward to any other replies you get from current students because i'd like to know as well!
good luck and congratulations on your acceptances!