For a high flow, low head application, like an infinity edge, I think that if you doubled the impeller size on the IntelliFloXF and reduced the top speed, it would be quieter, it would be more efficient and it should be able to generate more flow.
For example, if you doubled the impeller on the IntelliFloXF, the head curve at maximum speed of 1,725 RPM would look like the red line, so you would get 195 GPM at 1,725 RPM instead of 3,450 RPM and you could get even more flow if the ststem is designed correctly with very low head.
You could probably get 270 GPM with the larger impeller design vs. the 220 GPM maximum of the smaller impeller/
