In that other thread I mentioned that I would use the high pressure one on tires narrower than 2.0 (or 50mm) and use the high volume on 2.0 and wider.

On a 520, considering the width of tires and tire pressures, I would prefer the high pressure version instead, but you probably are in a range where either would work.

The high pressure version would take longer to pump it up, but your arms are less worn out when you are done.