it may brentford was more open vs Liverpool 3 days ago, but that is also down to speed of attacks.
first dipper goal was from a brentford freekick when everybody went ahead for a header and van Dijk cleared with a great long ball Jota headed it down to Nunez who could run 1 v1 and scored.
we would not clear it like that, we pass it around, wait, build up slow, wait for Brentford to reshape than start pass around their block good 60-90 seconds later. cant see Dias try a long ball clearance like that, he is instructed to do the opposite.
and then clinical finishing matters too, lets be honest Jota buries that header that Bernardo missed, and Salah would have scored that Bobb chance.
then all of a sudden Brentford couldnt not sit back as much, which favored dippers 3 days ago given they were 1-0 up after 35 mins so Brentford had to go for it bit more.