LDR and HDR models are using the same network and that hasn’t changed in quite some time.
The other models work differently and get continued training and architectural improvements.
The R535 and newer drivers should also show improved quality in these models.
So the recommendation is to not use the LDR or HDR models anymore if you can implement one of the other models in your application because those will potentially get better with every driver branch.
Of those models, pick what works best for your specific use case.