Hey there. Congratulations on your admits!
I believe the Johnson EMBA in New York, is that right? That's convenient but it is also putting you far from the FT program and any kind of on-campus networking.
I think Kellogg definitely has an edge in brand strength but more important, gives you access to recruiting resources and on campus activities. You will likely have a job and will be hard to participate in a Fri morning or Wed afternoon session with consultants but you could find a way to get out there if you live in Chicago. Otherwise, if you are flying in for the weekends, it may not make as much of a difference.
I am not 100% sure about a dual degree path. If it is costing you extra, I would make sure it would add value. Healthcare, MPM, and a few others are often required for certain positions and could be indispensable but others can be a questionable value add that may not make a difference for your career but may add value to your self-development.
I would also point out about a potential hoop-jumping for a 37-year old to switch to Management Consulting. If you are already in consulting that's easier. You an also take an industry route where you become a "specialist" but at 37 you won't be able to recruit for an associate consultant role that most MBB's come on campus for.
Again congratulations. Not sure I have helped but there you go