That's what I was thinking. If anything, I would say that the bull's scoreboard is probably lighter than the current one in the Sully due to it using lighter components. The LCD displays used these days are relatively light (think of how light modern flat screen computer displays are compared to the old clunky CRT computer monitors). Granted the Seawolves board appears to use panels of giant light bulbs to convey information and not a traditional tv style tube display so this weight comparison may not apply. Without any weight stats on both boards this is purely conjecture on my part.
If it is heavier than the current Sullivan arena board and reinforcements need to be made, you would think they could use the money they save by purchasing a used board on the reinforcements. Of course, I have no idea how much money reinforcements would run and it still might greatly outweigh any savings gained by getting a used score board. It's fun to speculate though.