Stax have an exceptionally flat and linear response from top to bottom - free of the peaks, aberrations, and ringing of dynamic drivers with their metal coils getting whacked about. I believe these issues of dynamic headphones contribute to hearing damage at higher levels, compared to Stax.
The Raal headphones really do look awesome. They remind me of a futuristic version of the AKG K1000, which I once owned. Sadly I’ve not heard the Raal’s yet. Glad you’ve got your forever speakers too! It’s not fun upgrading two systems at once...