Widewing,
That Corsair on the snowy deck is a -5N. There weren't any -4N. N stands for Nightfighter and they were equiped with a radar pod on the leading edge of the wing as shown in the picture.
The seconds picture is a -4B.
Viper,
As widewing said the red in the star and bar emblem is too wide. Also the number 13 would have been in white. Pretty much the red letters were used exclusively on aircraft that were painted overall black.
Spritle