Has Kane always been the same person beneath the mask?

Both versions of Kane were played by Glen Jacobs. Who also stars in WWE's feature length movie 'See No Evil'.

Kane As Always Been The Same Guy You Could Not Find Another 6ft 7 - 300 + pounder With The Same Body Type And Attitude Remember Where all Different in Ways

Yes the unmasked and masked Kane are the same but before the masked Kane ever debuted there was another guy named Kane in the wwe

the masked Kane was tronger than the unmasked Kane