Lightning Greaves and Swiftfoot Boots are obvious includes, but instants like Blacksmiths Skill, Deflecting Swat and Wild Ricochet are essential to protecting your King
The other difference is that Wizards says they put emphasis on practical cards for these precons
I guess thats mostly a flavor thing, because the creature you put this on will often tap something before your opponent goes to combat, in which case Reach doesnt matter
Yuna's card is the alternate commander for the FFX MTG precon deck Counter Blitz
Protection from creatures allows you to attack more safely, and the initiative and explore are two big bonuses that shouldnt be overlooked
If your opponents let you go unchecked, you can turn your whole army into 9/9s, which will wrap up any game very, very quickly