If an electron A at a specific spacetime loses a certain number of quanta of energy (say, 100 quanta), naturally its total energy has come down. Or, will anyone claim that it has thus increased or that it is in a constant state? Now imagine that it is accelerated later by other forces.
Consider another electron B at another spacetime. It has not lost so many quanta of energy (say, only 50 quanta). Like A, now B is also being accelerated with the same amount of energy.
Of course, whether our measurement of the acceleration energy in the two cases is absolutely exact is yet another ambiguous matter, but we suppose that they are equal.
Will the latter be at a better position in the total energy content than the former? Or, will it be claimed that their energy, mass, etc. After receiving equal acceleration from outside, are equal, merely because they are both electrons already taken to possess a certain mass?
Moreover, we know that in the path that both the electrons take there will be other physical influences which we do not determine and cannot. These influences must be at least slightly different from each other.
In short, the mass, energy, etc. of the two electrons will never be equal at any physical state, not have they been absolutely equal at any time. And we know that nothing in the world is in a static state. So, there is no reason to suppose that electrons will have a static mass, energy, etc.
Of course, we can calculate and fix them as supposedly static mass, energy, etc. These will be useful for practical purposes, but not as absolutes.
That is, our generalized determination of an exact mass for an electron need not be the exact energy, mass, etc. of an electron in various physically processual circumstances. At normal circumstances within a specific chemical element, and when freed from it, the electron will have different values.
This shows that no electron (in itself) will be identical in all its properties with any other. Our description of these properties may be considered as identical. But this description in physics is meant merely for pragmatic purposes! One cannot now universalize it and say that the mass, energy, etc. of electrons are the same everywhere.
What about the said values (mass, energy, etc.) of other particles like photon, neutrino, etc.? I believe none can prove their case to be otherwise in the case of these particles / wavicles too.
That is, there is nothing in the world, including electrons, quarks, photons, neutrinos, etc., with an exact duplicate anywhere else. This is the foundation for the principle of physical identity.
Bibliography
(1) Gravitational Coalescence Paradox and Cosmogenetic Causality in Quantum Astrophysical Cosmology, 647 pp., Berlin, 2018.
(2) Physics without Metaphysics? Categories of Second Generation Scientific Ontology, 386 pp., Frankfurt, 2015.
(3) Causal Ubiquity in Quantum Physics: A Superluminal and Local-Causal Physical Ontology, 361 pp., Frankfurt, 2014.
(4) Essential Cosmology and Philosophy for All: Gravitational Coalescence Cosmology, 92 pp., KDP Amazon, 2022, 2nd Edition.
(5) Essenzielle Kosmologie und Philosophie für alle: Gravitational-Koaleszenz-Kosmologie, 104 pp., KDP Amazon, 2022, 1st Edition.