I would say Portis is, based on the lone game he's played and where he was actually expected to go in the draft vs where he was drafted (#22).
Last night he completely outplayed Towns. In 27 high energy minutes, he went for 23 points (9-14 from the field), 7 rebounds, 1 block, and 3 3pt's made (3-4 on 3's). In 32 minutes, Towns had 9 points (4-11 shooting) and 9 rebounds.
There was also recently this quote by the still 20 year old Portis-
"I’m still growing," Portis said. "My doctor said I’ll be a 7-footer. I don’t want to be a 7-footer but that’s what he said."
He measured 6-10 1/2 with shoes (6-9 1/2 without), with a 7-2 wingspan, and a 9-0 1/2 standing reach, which are solid numbers regardless. However, a slight uptick in growth would only increase his value and allow him to play center more exclusively. Especially a center with a motor like his coupled with range out to the 3pt line.
I like Rozier a lot, but I really wanted Portis. I'm very interested in how they progress going forward. Hopefully, we took the right guy.
https://www.youtube.com/watch?v=QXl1F_FUonc