The 44 and the 43 are MUCH different boats.
Completely different hull and decks.
The 44 replaced the 43 in about 1986 with a newer design hull and full width aft cabin.
There is a great "blog" to follow based on the 44.
C-Shel
People who have 44's with the 6.2 Detroit's LOVE the fuel economy but take great care to really look after routine maintenance on them.