  We re-advocated the conjecture of indistinguishability between the quantum
fluctuation observed from a Rindler frame and a real thermal bath, for the case
of a free massless scalar field. To clarify the robustness and how far such is
admissible, in this paper, we investigate the issue from two different
non-inertial observers' perspective. A detailed analysis is being done to find
the observable quantities as measured by two non-inertial observers (one is
Rindler and another is uniformly rotating) on the real thermal bath and Rindler
frame in Minkowski spacetime. More precisely, we compare Thermal-Rindler with
Rindler-Rindler and Thermal-rotating with Rindler-rotating situations. In the
first model it is observed that although some of the observables are
equivalent, all the components of renormalised stress-tensor are not the same.
In the later model, we again find that this equivalence is not totally
guaranteed. Therefore we argue that the indistinguishability between the real
thermal bath and the Rindler frame may not be totally true.

General Relativity and Quantum Cosmology;Statistical Mechanics;High Energy Physics - Theory