Congrats on your admits!
Ranking-wise I think there is not that much difference.
At the same time, I think you have legit concerns about Texas and Cornell's network (esp undergrad).
McCombs is big in Tech placement and fairly regional. It is a hard choice and depends a bit on your network in the North East. Can you leverage that recruit for a job there?
It is hard to choose immediate $100K impact vs. potential future job recruiting and value from the alum network. Has to be your gut and whatever you feel more comfortable with. Some people throw caution to the wind and others are very rational with their decisions. I have changed my gut feel personality multiple times and sometimes i change it based on what else happened that day.
If you are a proactive and self-starter, I see picking Texas. If you need a fire under you to deliver results, then go for Johnson.
Good Luck!