I turned one of my duallies into a srw I have replaced the hubs "wheel bearing assembly" but I changed everything to gmt800 including rear axle to 2002 14 bolt 10.5 ring 4:10 disk. I'm fairly certain the hubs are the same but I can find out tomorrow. I do know the drw rotor is thicker at 39.1mm vs 32.8mm diameter 317mm and offset 70mm are about the same maybe a mm or 2 difference. The calipers and pads are different at least on my trucks srw has a smaller piston, lighter weight and the banjo bolt is off centered. The drw larger piston more mass to it the banjo bolt is centered they both bolt up the same on the spindles.
I can get you more specifics tomorrow if you want, I'm always at local parts store with my tape measure and micrometer to find the differences.
Funny enough I just looked up the wheel bearing/hub assembly front on autozone site and 3/4, 1ton srw or drw all the same part number.
I bought 2 Detroit axle wheel bearings with the wheel speed sensors 10yr warranty for $120 both free shipping on eBay. Just make sure you mentioned you want a left and right speed sensor they sent me them both left speed sensors. There is a left and right 2 of the three brackets on the sensor are different on each side.
Models w/ 4WD, 4x4 & Old Body Style 8 LUGS.
www.ebay.com