Hi Syncaidius,
I didn't take your question the wrong way... in fact I think it's a good question and here's my answer:

NotePad++ Has More Supported Languages

NotePad++ Has Tabs to support multiple files in one application

NotePad++ Has Themes

NotePad++ Is Windows Only

NotePad++ allows user configurable tools (parametric shortcuts) but doesn't capture compiler output

Jegas Edit can run on Windows or Linux ( I need to make a Linux Distro yet)

Jegas Edit Purposely doesn't use tabs because I personally like to ALT+TAB between source files and see them individually in my task bar

Jegas Edit Compiles and Runs applications from inside the editor (parametric shortcuts) and captures compiler output (so you know where you made syntax errors etc.)

Jegas Edit Allows Each individual "Language" to have it's own compiler, run, and five user tools configured.
Also, we weren't trying to beat NotePad++ or anyone else, but we wanted an editor that worked how we like them to work. I really like Eclipse for example, except its so powerful it's become a bloated monster that takes forever to load when you just want to edit a file. I'd rather use another tool and not wait.
The real 100% reason why we rolled our own is because our favorite in house Editor: Tera Text Editor (from a Russian fellow in Russia) doesn't seem to be supporting the software any more, it doesn't run on Linux and my consultants and colleagues have reported the configurable tools (Parametric Shortcuts) difficult if not impossible to use.
Also take this into account if your interested:
Notepad++ has been an on going project for a LONG time, and is Mature and they are on 5.7 at the time of writing this post. Scintilla is the heart of that application, it's married to Microsoft Technologies. and I might add it is a great program that supports non-english speaking folks as well.
Jegas Edit is about 10 days old and was mostly written inside of 7 days. By day ten, we're up to version 0.4 and have fixed a ton of things which made the Column Editing modes better and configuration was expanded to give more control of various colors and things for the built in supported languages. The heart of of this software is Lazarus, FreePascal, and various SynEdit components which translates into the fact that we can write this code once and compile it on Mac, Linux, Windows, Win64, HP-UX and more platforms without changing the code but unlike Java (Eclipse is in Java)... It runs faster because it's all binary like compiled DarkBasicPro and DarkGDK programs.
There is still more to do but I have to say that version 0.4 is ready for prime time use, at least for myself and other folks at Jegas. We like it so far.
The reason our EXE is bigger than the NotePad++ one is because we do not utilize DLL's etc. all the code is statically linked into the application versus dynamically linked.
I think you'll find that it's quite snappy and runs lean.. you can feel how lean it it when you run it. Frankly the LCL stuff is where the file size comes from - that's what makes the GUI work in platform independent way.
I think editors are like ice cream.. they are all good but everyone has a their own flavor preferences.
--Jason
[edited formatting and also.. Could you send me some HLSL code you might have? I think that it will work reasonable well with the "fall back" "ANY SYNTAX" mode.. you can program your own languages into Jegas Edit... not as FULL FEATURED as a hardcoded specialty thing like HTML highlighting etc or code folding.. but you can get the syntax right and set up your HLSL tools to fire off your shaders and test from inside the editor I'm sure.]