I will choose bnb over uni any day any time plus I don't understand why you are comparing this 2, is bnb binance a defi now? What is the point of making this comparison if they are from different ecosystem,
Anyways, bnb has stood the test of time in my opinion and have a strong backing unlike the later, uni may have a high trading volume and all that but it is still a high risk investment in my opinion unlike bnb with great track record.