First, both these costumes have the dark shades. However, there are a number of pirate style dresses available in the market in the other colors also; but, still the swashbuckler style is known for the dark shaded dresses. But, most of the gothic style outfits come available in the dark colors except some exceptions. So, the pirate shirts can be the perfect match with the gothic style pants and similarly the gothic shirts can also be worn with pirate style pants.
Because of this similarity, the people take these two styles of outfits as the replacements of each other. But, we cannot deny that the two have the different concepts. The pirate theme is based on the medieval and renaissance sea rovers and the swashbuckler themed films. But, many of the people, who are not concerned with the concepts, do not know the difference.
Both these types of outfits are available today on a number of websites. http://www.tudordressing.com is the perfect instance in this regard. This is the website that comprises of a number of themed outfits in the present scenario. Renaissance, pirate, steampunk, medieval, gothic and a number of other types of outfits are available in the present scenario. Besides, the website also consists of a number of other accessories as well such as nautical products.