I think TV could possibly be De Bruyne's agent or father, in which case I don't blame him for his bias. I rate Firmino higher than De Bruyne personally, although I admit the Belgian is having a better season, albeit in a better team with many great players beside him. Firmino has been great for what, 2 or 3 seasons now, whereas Kevin is only really playing well in this current season, and the way he played at Chelsea when given the opportunity was a tad underwhelming.
They are both good players but if I were a manager looking for an attacking player I would definitely go for Firmino, as I find De Bruyne's lack of pace and workrate (especially defensively) would be a problem, similar to what Juan Mata has faced in the National team with Del Bosque and in club football with Mourinho.