If you consider that in the middle ages the "architecture" was carried out by the Master Craftsmen, masons and carpenters, it is no surprise to see later craftsmen who have reached the top of their trade and progressed to a position of designing and supervising buildings, that the change in classification is quite common.
I have a family member ( my great gf brother ) who was a stonemason, then master mason employing men and in his final two Census records he appears as Architect and Surveyor. On the other hand my ggfather who was also a stonemason and employed other men never rose above the rank of stonemason.
I believe that it was not until about 1930 that it became unlawful for anyone to call themselves an Architect unless they were properly Registered.
So I suppose thanswer to the question is, yes, it is probably the same person.
