Rebelslav,
I'm an admitted MIB student for fall 2018 (and I've already accepted the offer) so I'm 100% partial as one of your potential future classmates. That said.
I think your plan on attending the opening houses is good and the right course of action.
For me visiting Fletcher and talking with students and professors was what solidified my decision to apply. Everyone is so open and available, I really felt the energy in the building and the MIB program is unlike anything else I found in the U.S.
I cannot speak to Ford at all, though obviously both are great programs and have amazing backings with their unique advantages.
For me what set Fletcher apart was the diversity of the students from around the world. Aside from the MIB's, you'll also be taking classes with the MALD's. It is first and foremost a School of Law and Diplomacy with the focus on international relations; the exchange of ideas which I witnessed was really exciting.
I would suggest in advance of the open houses look at the courses and electives, see what you think you would take and how they two schools stack up. Reach out to professors, I'm sure they would chat with you if you had any questions. As a potential applicant I had a professor invite me back to campus just to sit in on a guest lecturer who he thought I would be interested in.
Also look into where the graduates end up and what programs hire their alumni.
And (as a plug for Fletcher) don't discount being in Boston and the proximity to many other institutions which brings its own advantages.
I hope this helps you, and also gently pushed fletcher ;-)
What's most important obviously is you being comfortable with it personally, Good Luck!
I'll be attending Fletcher's open house so I look forward to meeting you and hope to see you in August.
gbbus03
ps. Also look up the facebook group if you haven't yet, get to know us!