They are quite different.
CWTN Plugins will automatically upgrade from level to level if you get new spells/discs/aa's, KA will not. You will have to manually add things you want to use, remove things you don't want to use.
CWTN Plugins are designed to be the most efficient they can be for their class at any given level. This include predefined burn routines, predesigned combat routines, automatic downtime routines, etc.
CWTN Plugins has limited user customization. In KA you can customize a large amount of how the character interacts with the game. Down to specific conditions for doing certain things. This is not an option in my plugins. However, I've made an effort to generate pre-defined conditions for everything. Such as if you have a summon clicky, you can /zerk addclicky summon 20 and the character will use the clicky to automatically summon items from that clicky until you have 20 of them.
The plugins are never locked into a loop waiting for something to happen, because of that their responsiveness tends to be higher.
There's a large list of reasons someone would want to use my plugins instead of KA. I'm sure there are a large list of reasons someone would want to use KA instead of my plugins. You can watch the videos on their individual resources and read the user reviews, or ask in their individual discussions why people like them, what benefits they feel it brings to them.
Of course you can always use some of the ones that are currently in development to get an idea of what they are like for yourself. I don't really advertise my plugins, the users who have purchased it and enjoy it are happy to advertise them for me. It's rare that I need to convince anyone to use them. If you'd like to try one of the ones that are currently for sell, let me know and I'll give you a trial period to test it.