As Gulliver/Pakl has pointed out many times, Movie 8 Goku, Gohan and others seem to be based off their Pre-Cell Games selves. In other words, Goku and Gohan were in their suppressed states.
This implies that Goku was in his "warming up" phase, who is NOT stated to be above SSjG3 Trunks (although, I think he's close; if Trunks is a 0.5, I have Goku at a 0.3 or a 0.4).
Since RSSj Broly was stated by Kaio to be above everyone else, this implies that he is above SSj Goku (Movie 8/Suppressed or "Warming Up") by a pretty large gap, which puts him above SSjG3 Trunks IMO.
With that said, Broly does NOT give Trunks a dinner first.