That's not true.
In this tournament, Lewandowski has constantly sacrificed his game as a striker to help his team. His workrate was immense, he carried the ball a lot of the time and was active all over the pitch dropping deep, going out wide etc. He always had one or multiple defenders going at him, was fouled a lot and often quite hard. He's also a defensive factor.
Ronaldo works hard in a way, but mostly in terms of bringing himself in positions to score. He contributes little to build up play and almost nothing to defensive work.
Their roles as the main man of their respective team are quite different: Lewandowski worked his socks off for Poland, but the Portuguese team mainly played for Ronaldo to score.