Absolutely. This site is the best photography measurebator site there is.
Light meters work for a reason. Meters work because f 2.8 is f2.8 is f2.8 and ISO 100 is ISO 100 is ISO 100 and 1/125 is 1/125 is 1/125.
Yes, there may be very small differences in lenses and cameras owing to manufacturing tolerances, design, etc. The bottom line; however, is that these differences are infinitesimally small and will make no difference for practical purposes. Perhaps in highly specialised, scientific uses the differences will be important but I don't consider that to be a generally practical use. If the differences between lenses and cameras were that significant, meters wouldn't work.
For practical purposes then, DOF is a function of aperture and magnification. Ergo, same aperture, same magnification, same DOF.