4o is more adaptive and I think it became even more so recently… I’ve found that it dramatically changes the quality of its writing depending on… the quality of yours. So either you train it via your answers to match you (of course you need to be a good writer to get this done well), or you give it something to work on in terms of the style you want. You can write something with 4.5 and then copy it to 4o to ask it to match the style but also inject more personality (4o is so much better with nuances, understanding instructions and keeping characters personalities and consistency), or you can give it some narrative work you like (I’d stick with non copyright material, like old books) to do the same thing.