I am not entirely sure what data you are looking at but the data Ben showed, shows the two pumps as being identical. The charts are difficult to compare if they are not directly overlaid so I would go by the tables.

But I really wouldn't worry so much about pump sizing. You could go with a much smaller pump if you wanted and still have everything work fine. As an example, I have a 20k IG pool with solar on a two story house, a suction side cleaner all running on a 1/2 HP two speed pump. There really is no need for such a large pump. The small pumps do just fine. The flow rate is reduced only by a little but the power use is reduced by a lot.

Also, solar really doesn't need a large pump either. It is true that you will be running solar on high speed but about half the time my pump runs on low speed because I don't need the heat gain from solar so it is still nice to have and will still save lots of money.