IMO, the Yamato top view fighter mode CAD lineart is 98% spot on.
The, Yamato side view fighter mode lineart is perhaps 70% when compared against the Hasagawa, TIAS etc side view lineart.
However, when compared against Kawamori's 3/4 view lineart, the Yamato is much closer, perhaps 90%, as a lot of Kawamori's fighter mode lineart has a short nose, bigger curved belly, thicker forward fuselage and thicker lower legs and intakes.
Anyway, the YF-19 probably uses the most anime-magic in it's transformation of any of Kawamori's designs. One of the prime areas being the intakes, which are a completely different shape in battroid and fighter modes.
Graham