i haven't play lol yet ( still waiting for a key ) so i can only give my opinions on HoN.

i don't like it.
the map is abit too dark, making it hard for me to see the terrain clearly.
the skills can be too flashy at times, making it hard to see what the hell is going on in the middle of a team battle.

this is just my own opinions.. i'd stick with dota.. HoN isn't worth $30 for me..