Here's a summary of the differences between versions 8.0 and 8.1.1 of the LaserWriter driver:
NEW FEATURES:
Improved Tray Handling
When installed, the user may select the optional 500-sheet paper cassette as the "default" paper source. This was a much-requested feature from users. This feature is found in the "Configure" dialog during printer Setup from the Chooser.
Precision Bitmap Alignment
The driver now scales bitmaps in accordance with the resolution of the output device: 4% reduction as usual for 300 dpi printers, 10% for 400 dpi, and so on.
Consolidated PPDs
Multiple PPD files for different memory configurations are replaced by a single PPD file containing specifications for different page sizes. For example, we used to have 3 PPD files for the LaserWriter IIg v2010.113 (4MB, 5MB and 8MB) - with v8.1.1, we have one.
Improved Color Matching
The driver will use the ColorSync System Profile, if installed on the host, instead of the Apple 13" colorspace profile built into the driver.
BUG FIXES
There are various bug fixes in LaserWriter 8.1.1 that address both driver and 3rd party application issues. Apple is suggesting that users of LaserWriter driver 8.0 upgrade to LaserWriter driver 8.1.1 mainly because of these bug fixes, and also for the additional features.