Hey there,
Well, in this case, i'd go with the 1600AF build as it's slightly better CPU wise for gaming/streaming. 4c/8t CPU like the 3300x (although a beast of a new processor), but also like the I7 7700k are found wanting when it comes to gaming/streaming. If you could put the 5600XT with the 1600AF, that would be great. With that said though for any decent streaming of content @1080p settings with no dropped frames or stuttering requires a stronger GPU. Like a RTX2060/Super or 5700/XT