Lightoller had a rather adventurous life at sea before TITANIC, served as a Royal Navy officer with distinction in WWI with awards for gallantry, advancement and commands. He went on to further adventures between the wars (gold prospecting in the Yukon, a bit of "cowboying", and even hobo-ing on the railroads for a while) and then took his yacht to Dunkirk, under fire, for the evacuation...
Phillips' portrayal seemed a little stand-offish, officious and uptight... even a touch "toady" towards Captain Smith. His feverish depiction...near maniacal, to me... at the loading of the boats and balking at Thomas Andrews' inquiries, did not appeal to me as one who had confidence... who'd "been to the rodeo", and faced danger before. In fact, he looked to me like he was going to throw up. LOL
All these visuals put together left me unable to imagine Phillips' "Lightoller" as a decisive man, with the patina, bravery and charisma of a leader that the real Lightoller's biography suggests.
More's portrayal, on the other hand, reminded me of many natural leaders I admired during my own 20 years in the US Navy. He showed a quiet calm borne of hard experience, such as the real Lightoller had since running off to sea as a 13-year-old boy, including several shipwrecks and emergencies at sea. Perhaps a tad romanticized and larger-than-life, but there ARE those types of men at sea... and Lightoller's later accomplishments come as no surprise from such a character.
So, I lean toward the Kenneth More personality.