Both versions suggest that the Emperor didn't know about Luke at all.
It's a plothole in the story period....no matter what version it is.
In the original....
It says that Vader is looking for Skywalker in the scroll...so Vader knows about the existence of Luke.
But in that scene, the emperor definitely seems like he didn't know and just found out. and he's calling Vader to tell him about it.
Plus, the Emperor doesn't seem to know that Vader is already looking for Luke.
Also, there really isn't any surprise in Vader's voice when the Emperor tells him about skywalker.
In the SE
Same basic thing happens as in the OOT, but Vader seems to act a little more surprised now. But there still is a lack of clarity.
Something isn't right about either one. There's needs to be more clarification. Too vague and their's a piece missing obviously.
Overall though, the OOT version doesn't contradict the PT.
Still prefer the original though.