The GTX 1080 Ti HOF is the fastest model from GALAX. This card will feature triple-fan and triple-slot cooling solution and custom PCB with three 8-pin power connectors. It’s a fancy and innovative product, but the main goal for HOF series is to satisfy professional overclockers.
The Colorful iGame GTX 1080 Ti Vulcan X OC also has an integrated LCD display but that model is aimed at the Chinese market. It's interesting but not really a killer feature IMO.