You do you want the explicit representation of the gauss coordinates in the physical space?
Note that x = SpatialCoordinate(mesh) is a symbolic representation of the quadrature point.
The quadrature degree depends on the variational form (see: How to obtain the Gauss quadrature degree estimated by the form compiler - #2 by dokken) and thus the quadrature points will vary depending on if you look at your linear or bilinear form.