Experience is shared between all players on your team. If you kill a creep, a player, or a tower everyone on your team gets the experience.
There is no gold and there are no purchasable items.
You start with all of your skills, and with each level they increase in strength. It is not like Dota 2 or League of Legends where you choose between skills to level as the game proceeds.
Every few levels you can choose between a few talents. This, in a way, makes up for the lack of items in the game. This is where players make reactive decisions based on how the game is playing out. In some cases it's better to have one talent than it would be to another. On the character I played all my talents, save for my ultimate, were passive.
You get your ultimate at level ten.
You get experience while you're dead.
At the moment there is no benefit to last hitting. You get no extra experience.
Aimed abilities have a League of Legends like crosshair to indicate where your skill will go.
On the map I played it was possible to collect items on the map that give buffs to your team or debuffs for the other team.
Jungle creeps can be captured and used to push your lanes.
You have a spell that sends you back to spawn similar to the mechanic you see in League of Legends.
There are no teleportation scrolls. You use a mount to travel around the map quickly.