The 1000.2 is an elliptical-shaped dish designed for use with 3 oribital positions each separated by approx 9~10 degrees from one another. To say that it is a "bigger" dish is technically correct, though the capture area for each individual orbital location is only 314 sq. inches (approx).
By comparison, 3 individual 24" round dishes would provide 44% more signal, but that's barely 1.2 db of signal improvement, so keep reading....
Individual 30" dishes (compared to the 1000.2) would yield nearly 3 db signal improvement (3 db = twice as much signal) (db=10Log P2/P1). Now we're getting somewhere... but keep reading.
The FCC OTARD rule
allows up to 1 meter dishes (39.37") and I'm here to tell you this thing is "the big gun" in maximum legal size* satellite dishes. Compared to the 1000.2 multi-sat dish, the Winegard DS3101 provides a whopping 40 db of gain (6 db improvement). That works out to nearly 4 times as much signal. If you're looking for a "rain fade killer" the 3101 is about as close as you're going to get and still be able to (legally) hold your HOA at bay. Of course you'll need 3 of them

(one for each orbital slot, natch) along with 3 dual LNBs and a miultiswitch. For reasons which by now should be obvious, I do not recommend roof or eve mounting with the DS3101 (22 lbs + mast).
The fun begins with Az/El alignment of the 3101 because it's -3db beamwidth is only 1.8 degrees. Compare to sighting-in your deer rifle on a 200-yd paper target. You're either dead-on the bullseye or else you're not even on the paper. For this reason your mount (2-1/2" pole) must be bedrock rigid. If it wobbles or sways even the slightest bit in the wind you're not going to be a happy camper because your DS3101 will be wavering off-path and you won't be watching TV. This bugger has to be
ANCHORED
* maximum legal size per FCC OTARD rules concerning HOA deed restrictions, etc. The FCC will back you up on this one, but not on anything larger.