I have a transit with medium roof and love it so far.
Prior to hurricane Harvey i had a 2012(i think) Nisssan nv high roof.

Between the two the Ford has way better acceleration than the Nisssan, mileage is slightly better but nothing spectacular.
I had a bit more head room in the Nisssan but more length in the Ford (extended model).
The transit fits thru drive thrus better, but finding a car wash is still a pita.
The ride is smoother and more comfortable in the ford
I do wish i had cruise control.
The Nisssan had a great center console, but it generally was just a junk collectior
Overall i think they are both great vans.
I am very happy with my current transit van.