Also nice. Wow, it's big. I tend to make models about as small as workable, which generally means shortest edge between 0.5 and 1 cm.
I haven't made either of your models, I would make this model with about 16cm diameter, or 6.3 inches. About a quarter the size of yours.
The smaller they are, the more I can fit in a display case

Big models are great though if you've got somewhere to store them.