Is there any time OR exceptiopns where Life safety and critical loads can come out of the same Branch circuit panel?? I think not but just asking. Also circuits not listed as Cirical in the NEC should not be in the Critical panel also right.again I think not but just asking.
You are correct in regards to both type of circuits coming from one panel, the answer is no.
The Critical Branch is actually pretty lax as to what it can serve, see 517.33.
The Life Safety Branch is specific as to what can be fed from it and this is reflected in the first sentence of 517.32