You forgot to quote your sources
Seriously, what is inaccurate in Titanic (1997) and more accurate in A Night To Remember (1958)?
Not that
Titanic is necessarily inaccurate, but
A Night To Remember features more real life characters who were on the ship - this is because the movie is much older and there were many more witnesses still alive when the movie was made and they were used as references for both characters, details and the ways people behaved throughout the disaster - the same was not
as true in 97 when Cameron made his film. Outside a few historically key characters (such as the ship's officers, Molly Brown, etc.) Cameron's version was largely fiction as far as the
main characters in his film.
Split: there is still controversy over whether the ship split in half before or after it sank. In earlier films it is shown to sink in one piece (this could be forgiven if incorrect as the films were made before certain discoveries about the wreck on the ocean floor). However, based on eye-witness testimonies, it's still a controversy as many (including the ship's first officer) stated they saw the ship go down in one piece, while some others say they saw the ship break in half (or "heard" it break or "think they saw" it break) before it sank.
IMO,
A Night To Remember utilizes its run time to focus on details surrounding the sinking of the ship. It also follows a variety of characters, some with more screen time than others, but doesn't focus on any one personal story as its primary plot.
Whereas
Titanic spends a lot of its time focusing on its fictional lovers' story and their supporting characters. Thus ANTR seems to give a far more detailed and comprehensive telling of the ship's sinking and how it affected a wide group of people aboard as its main plot (with focus on factors that led up to the disaster, ship design, the survival of the lifeboats, etc.) instead of spending as much time on a fictional plot, with the sinking of the ship as the setting as
Titanic did.