Can't argue there, the alliance won in that exchange, but that's kinda because the night elf model is so lame in comparison.
They put greater distance between them in the 6.0 remakes where night elves came off uglier than their classic models, whiles Thalassians got even better. Even I was shocked how terrible they came out.
There are other reasons alliance won out in this exchange, but then Nightborne have a niche