I have to disagree there.
The difference is down to design not in universe plausibility.
I remember seeing AOTC and being rather taken with the opening scene of a giant chrome wing landing on foggy Coruscant.
The Star Destroyer is a piece of military brutalism.
It's matte clustered detail lends it a sense of massive scale.
The Naboo ships aren't from that same design ethic.
They are meant to look light and shiny and they do.
A VC10 looks just as other worldly :
One may argue that the resolution of the digital medium and the computer model get in the way of selling the model itself but the idea is sound and plausible.