"suction power" grizzly 1.5 vs. 2hp?

[travis howe]

So I have an older 1.5hp 110v which i belive to be the 1300cfm model, I've seen the 2hp 220v 1550cfm for sale locally used. I was wondering if this would be noticably different in performance? Louder? I have a small shop so I'm not sure it would be much different?

[Sonny Edmonds]

It would help to know just which ones we are trying to compare.
Couple of shots in the dark:

G1028Z 1 1/2 HP Dust Collector Matches your spec, has 10.3 inches static pressure.

G1029Z 2 HP Dust Collector Appears to match your other spec, it has 11 inches of static pressure.

Kind of a tough call to say .7 more inches of suction power is going to be of much benefit.
I think you'd be disappointed with any gains from the purchase.

But....
If you used the 1 1/2 HP as a booster blower, and had it's discharge going to the suction of the 2 HP, you'd notice a sizable difference and gain in the power of the wind.
Add a home grown cyclone between them... ahh, what a system!