MBAHopeful9876 Just my 2 cents...
I would suggest talking to current 2 years and alumni from Johnson to understand how their Tech placements are going. I spoke to a few recent alums when I was preparing my application and the general consensus was that Johnson's Ithaca programs are still struggling a bit when it comes to Tech placements. But also that things seem to be improving. Definitely, those improvements will take time.
Also - there's a popular GMATclub post about Financial Aid Consideration curve. Perhaps you can check that out to see if the additional money for Johnson makes sense in your case. You could also try asking Marshall for more money, tell them about your admit from Johnson. As per my understanding, Marshall has consistently been doing well for Tech recruiting (irrespective of the rankings debate).