bwi vs. bwn

[grarpamp]

I have a BCM94312MCG, which driver should I choose and why?
The man pages are nearly identical.
It appears that bwn is newer/maintained?
And more modular with siba?

Can the newer upstream firmware at openwrt be used with bwn-firmware-kmod?
 http://downloads.openwrt.org/sources/broadcom-wl-4.150.10.5.3.tar.bz2

Where did the firmware blobs in the above file come from, here?
 http://bcm43xx.berlios.de/
 http://wireless.kernel.org/en/users/Drivers/b43/
As a result of being written to this spec project?
 http://bcm-specs.sipsolutions.net/
 http://bcm-v4.sipsolutions.net/
With what I gather so far, I don't think they do?

Or from Broadcom, in a windows blob, which fwcutter is used with?
That's the part I'm not sure of. Where do I find the parent blob drivers?
broadcom.com doesn't seem to have any 802.11 wireless files, as
if it's all OEM.

And how might this come into play?
 http://www.broadcom.com/support/802.11/linux_sta.php

Trying to put the pieces together. Thanks.