HoN = no chace
LoL = pretty decent chance
HoN is just a graphics and platform update from DotA. They literally copied most of the mechanics from DotA, including Tangoes (eating tree for early game regeneration). They also ported most of the heroes from DotA. Then HoN starts to fail, and they decide to go free2play. Guess what, now they steal from LoL, and use the exact same payment scheme.
On the other hand, LoL has some unique elements that distinguish it from DotA, like elements that persist beyond each round (Summoner skills, those little runes/emblems/symbols you can equip), new game modes, and respawning barracks.