Sublime Text is the most finished user-friendly product on the list of these text editors, having been released in 2009. Sublime Text has the deepest amount of built-in support for many different coding languages and features. The major downside of Sublime Text is that it is closed source and a single user license costs $70, although there is currently no enforced time on the evaluation period.
Vim and GNU Emacs are interesting choices with similar design philosophies intended for individuals who are interested in the extreme of efficient processing, but also willing to learn a completely new environment that may not be intuitive to the average user. These two choices are based in Linux and released several decades ago, although they are kept up-to-date by third party plugins. Many of the top developers in the world swear by one or both of these text editors, and they have a deep and storied history. They come with built-in tutorials to get started, and there are many advanced resources online.
A text editor is an important tool in the arsenal of an SEO specialist. Make sure that you choose the text editor that meets your needs and allows you to take advantage of advanced functionality to efficiently accomplish your work.