Quote:No difference. Both have 60 images per second. It only matters when you want to upload to YouTube or watch on a player that cannot deinterlace.
Case in point: Top Gear. Their studio part is 25i, while story videos are 25p. When re-encoded to 720p25 the studio part looks less live and more choppy and resolution drops in half, while the stories look the same. If BBC adopted 720p, then instead of broadcasting 25p within 25i as 25PsF they would simply broadcast 50p with frame-repeat flag for 25p segments. Much simpler IMHO. And no need for deinterlacer to figure out whether it is native 25i or 25PsF.