Milborne Group is a condo marketing firm, not a developer:
45 years experience, $27 billion in sales, and realtor partnerships around the globe, Milborne provides unparalleled results in the new condo marketplace.
milborne.com
Which is all the more curious as to why they were listed as the purchaser of the Connolly. If I recall correctly, it was confirmed at the time that they were representing an unnamed ownership group.
The developer of 75 James is Fengate and LiUNA - who from my understanding hired Milborne to do the marketing for their condo.