Naron also thinks so (different proportions, animation details), so the replacements were made very specifically.
In general: if you want, take a look. The group has detailed screenshots for each unit and object. It's a complex, titanic work and, in my opinion, at a very high level.
In terms of visual quality, it is comparable to the level of Xuxo, with no less meticulous approach. The difference is that in GEM, the emphasis is on the global map (terrain and objects), and in NVS (at the moment) on the design of units and objects.