The hull on all 25's is the same. So both were!
Bob Seidelman and John Cherubini designed the original Hunter a Hunter 25. From 73 to 75/76 the design was unchanged. From 76 to 83 the upper half of the boat was changed to give the cabin more head room further foward. The earlier design (73-76) was designed by both men, the flatter deck in the front I beleive was Seidelman's influence. It is better for racing, easier and quicker to move around. After Seidelman left Hunter in 75/76 Cherubini changed the topside to give the boat more cabin room. Like I stated earlier the Hull remained the same. Hope this helps.