I know this isn't exactly hardcore documentation here, but the internet seems to indicate that it is the same building; just remodeled.
Anything is possible, but some things are highly improbably.
Back in Civil War times (and before) a brick building was a BRICK building. It wasn't 2x4s with a brick veneer -- the exterior walls were solid brick and probably a foot thick. In order for bricks to span over an opening, there has to be some way of transmitting the weight of the bricks above out to the sides of the opening. The two ways to do this are (a) lintels, and (b) arches. The old photo shows heavy stone lintels. In order to remove those lintels and replace them with arched tops as in the modern photo would require demolishing and rebuilding the exterior wall from the level of the tops of the first floor windows up to the roof.
Could it have been done? Sure. Would anyone have spent the money to do it? Highly unlikely.
And yet, if all those articles are to be believed, I guess someone did.