Just wondering,
If you spend the extra $20 on the imperial edition, you get a horse. Is it the same horse (other than looks) that you have to spend 15K on in game? No skills to buy, etc. - you just get a free horse?
If you purchase the Imperial Ed. you can purchase a horse for 1g. As posted above it is 15% speed and 10% stamina, you can increase these stats as you would a normal mount (speed/stamina/bag space). Also you can purchase more then 1 per character, so you could for example max out ones speed and have a mount with maxxed bag space.