Cool hack - I have the ‘smart’ managed version of that switch (although the PoE version of it I think), and it looks exactly the same to the unmanaged one - absolutely makes sense that it’s basically identical (just a BOM change for the different flash to fit the larger firmware).

Often it’s way cheaper to have one hardware version and control features in firmware, and that principle is even more true for silicon (same die but fuses that are blown to disable parts of it, or the chip clocked down because it might not perform properly at the speed of the more expensive SKU), so not surprising it’s this way!