Nope its 16nm  because the wafer cost per TH on yeilded die is lower on 16nm than 7nm.
No controller required in the RJ45  version, cgminer runs on the AI chip,  dual core  risc V.
I think the option with the non integrated PSU will probably rule the day, especially when folks figure out that if you have the right PSU, you can run it   above 31TH.. (31 TH is running about 1/2 the max clock) you'll take an effciiency hit that more than pays for itself at lower power prices.  
The purchasing decision and operating decisions become a bit more complex when you look at running the machine in max effciency mode ( say 24TH ) versus running it in max hash rate mode ( 38+ today) And how do I just put one number on the spec sheet? and then you have to factor in how efficiency changes with ambient temp.
Its almost like an AI problem. just kidding. But I do foresee customers who will now have fine grain control of the frequency that is tied to the actual operating conditions of their farm.