It's impossible to say without an extensive comparison between the transfers, I've only seen the Pioneer pressing. I'm definitely not an authority on these matters, what Asaki said could also be the case. I'm just basing my assumptions on dirt spots and splices etc.

The scanline pattern differ between releases because of the lack of resolution/detail, if that is down to different IP/film elements used or a shortcoming in the video mastering process I don't know, for Star Wars it seems to exist at least two different IP's, don't know if that is the case with Empire.