There's no difference between the two if you pin the provider to Deepseek on Openrouter.
If you don't want to mess about client side with pinning, set a guardrail on Openrouter that limits the available providers to only the official one.
If you don't want to mess about client side with pinning, set a guardrail on Openrouter that limits the available providers to only the official one.
Also if DS is down you can choose another provider.
I have credits at DS and OR directly. But I do see the value in OR.