You’re not missing out. Astra was good for a couple of days and is now so quantized it’s often worse than 5.6. And 6 sol is a nothing burger to keep a wedge in the media when Opus 5.5 came out.
In coding? Software architecture? Math? General knowledge?
The diversity of model use-cases is so broad that comments about "model x is better" without any context are largely useless