Depending on what you call by aliens. There are aliens who carry a physical body or 3D body, and there are some who can switch from 3D to 4D and more. We call them inter-dimensional entities. The reptilians are in the 3D and can switch it to 4D. So , they can be perceived as so called spirits in their 4D realm but as just another type creature in their 3D. So it all depends.
Depending on what you call by aliens. There are aliens who carry a physical body or 3D body, and there are some who can switch from 3D to 4D and more. We call them inter-dimensional entities. The reptilians are in the 3D and can switch it to 4D. So , they can be perceived as so called spirits in their 4D realm but as just another type creature in their 3D. So it all depends.
I see what you mean, from that point of view they would be one and the same.