Well, Blender has some features that trueSpace lacks of. Like fluid simulation. And Blender lacks of features that trueSpace has. N-Gons for example. In the end featurewise Blender may even have more than trueSpace. But what's the best feature worth when you cannot reach it because the UI doesn't let you? And who needs a fluid simulation for low poly game content? Featurestuff is all about if you need it or not. And i don't miss anything, featurewise.

The main issue for me is clearly the interface though. trueSpace is highly customizable. Blender not. It misses a working GUI, it has fixed hotkeys instead. I learn the first 10 hot keys. And when i learn the eleventh hotkey i have forgotten the first one.

I am a very visual person. Gimme an icon and i will remember for what it was. Gimme hotkeys and i will always need to check which hot key was what. Searching what hot key is what costs lots of time. Especially with double and triple combinations as it happens in Blender. Close to fourhundret features are hotkeyed when i remember right. Which means close to fourhundret hotkeys that you need to know. Which costs lots of time to learn.

Hotkeys are also slower to me compared to a button driven interface. Because i always need to look down to the keyboard. And that breaks my workflow.

Not to forget that my neck starts to pain after ten minutes working with just hotkeys.

Don't get me wrong. I also love hotkeys, and i have also setup some hotkeys in TS. But just hotkeys is too much for me. A just hotkey driven UI might not be this bad when you just use one software. But i use lots of software. And then a GUI is a gods gift