Pegasus vs Unicorn vs Nightmare - what are the differences?

What are the differences between these horses?

I notice Pegasus and Nightmare both have wings but the Unicorn does not - does this mean the Unicorn has some advantage those two do not?

 

https://www.blackdesertfoundry.com/awakened-horses-tier-9/

• Pegasus – This awakened horse is a winged horse which uses their large wings to safely drop from high places. They do not “fly”, but can jump off cliffs and safely glide downwards at high speeds.
• Unicorn (Dineh) – This awakened horse is a friendly mount which can buff targets to give them higher DP/Evasion and can also heal them. The unicorn is a supportive mount which can prove useful in battle.
• Hell Horse – This awakened horse is not as fast as the other awakened horses, but has more powerful attacks and stronger horse skills. They use fire and explosions to destroy their enemies in battle.

I think the same goes on gamez

 

WAT? Tripple instant accel. Dont think Doom will be the slowest one. Dont even look at this outdated BDO foundry info...

 

Well, the other good side for Unicorn is ... it is the only one who can run through the desert without skills/speed penalty