Booming Blade being reprinted and nerfed in Tasha's [New Preview Release]

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I could just as well remove Shadow Blade from both builds and the difference wouldn't change much.

G.Invis means attacking with advantage for both main and off hand.

You'll have better average damage due to greater likelihood of landing the sneaks. The option of an offhand attack trumps the piddly 13.5 damage from a SCAGtrip; unless ACs drop below 16ish - which shouldn't even be mooks at 20.

A SCAGtrip is nice when you know you want to use your BA to disengage; but it is only a modest increase in other scenarios because of how important it is to get a second chance to land SA.

Rogues aren't weak, and SCAGtrips are merely icing for them - not the whole cake.