Jasonkaler knows way more about this than you. If you read the second link that you posted, you can see that Win 3.11 requires at least an Intel 386, which is 32 bit, while Win 3.1 can run even on an Intel 286 (which is 16 bit). Also in the second link you posted you can see that:
- Performance Enhancements (VFAT and VCACHE). WFW 3.11 includes VFAT, a
32-bit file system that processes INT21h calls for file I/O on local
disk volumes in protect mode. WFW 3.11 also includes a unified protect-
mode cache, VCACHE, for both network files accessed by the network
redirector and local files accessed through VFAT.
- NWLink (and NWNBLink): 32-bit protect-mode protocol for the IPX/SPX
transport. Routable. NWNBLink adds a NetBIOS layer.
- Enhanced Communication Architecture. The architecture of the
communications interface is more modular. Its components are COMM.DRV,
*VCD, VCOMM.386, SERIAL.386, and LPT.386. With this new modular design,
vendors can write device-specific drivers for serial or LPT ports to
interface with VCOMM.386. It uses the 32-bit interface directly with
VCOMM.386.
When you're wrong, admit it, and then move on...