See above post:
Basically, if you dont know about scanning, dont suggest film choice is going to be different than for the same task as if he were optical printing, because you simply dont know that, and its not the OP's question anyway.
If you do know about scanning, then like I mentioned above you'll know that the film choice is going to be the same, especially for a 16x16 quality reproduction.
This is the question he is asking
"What portrait films are recommended for sharp fine grain 16x16 prints from 6x6cm negatives in mixed lighting conditions?".
He did not at any point ask which film is better for scanning. This just happens to be his choice of reproduction in this process, and it doesnt maky any difference, there isn't a better place than APUG to discuss film abstract of variables other than the variables of the film itself.