Is there a difference in charging time between 15V / 3A and 20V / 2,25A?

I'm going to buy a proper power adapter for my power bank, so that I can charge it at full speed. As far as I know, charging speed is determined by how much watt is delivered. Unfortunately, I didn't find anything on the internet. The power bank has multiple input options: 5V / 3A = 15W 9V / 3A ... show more I'm going to buy a proper power adapter for my power bank, so that I can charge it at full speed. As far as I know, charging speed is determined by how much watt is delivered. Unfortunately, I didn't find anything on the internet. The power bank has multiple input options:

5V / 3A = 15W
9V / 3A = 27W
12V / 3A = 36W
15V / 3A = 45W
20V / 2,25A = 45W

Another example: 9V / 2A (= 18W) vs 12V / 1,5A (= 18W)
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