It is very close to Trafalgar. You'll want to go to the pete-coleman site to get other opinions, but that's mine.
http://www.pete-coleman.com/forum/index.php?sid=1a6ab94396469e18f81c8ba8ef773cd7
Points of contention include the side entry ports that she has now, how much of the upper bulwarks actually existed, whether the stern galleries were open or closed, some of the rigging details and myriad painting details, the last two of which are pretty much up to you.
Most of the record is in the form of oil paintings by artists who weren't at the battle, so it's all pretty jolly and good natured.