The Alcor has the same sensor and switches as my Steelseries Rival.
The Avago 3090 has no built in acceleration or angle snapping whatsoever, I was using a Razer Imperator before my Rival and the sensor in that had hardware angle snapping. So even if you disabled it on the software side it was still there.
Going from that to the Avago 3090 on my Rival I could instantly tell the difference.
The CM Alcor is definitely the mouse to get if you want zero acceleration and angle snapping both software and hardware wise.
NZXT Switch 810 - i5 2500K - Gigabyte Z68 UD3H - 8GB 1600mhz Mushkin Blackline - Zotac 970 GE - Crucial MX100 256GB SSD - Samsung F3 1TB HDD - Corsair H100 - Corsair HX850 - Asus VE247H
PC Audio: Asus Xonar STX - Sennheiser HD650.
Portable Audio: FiiO X3II - Audiofly AF140 - Etymotic ER4s - Fidue A83.