Hearthpwn

Joust is still a gamble whereas Inspire is more controlled. However, Joust has strong value if successful and can be viable according to your deck, such as a ramp druid deck.

Joust is shit, who duels for a draw? it should have only been victory or death.  

The problem in joust starts when is a rng-inclused effect. Inspire is safer than joust.

In my opinion, inspire > Joust!  

So, in the end, Inspire is a clear winner. Just see at the arena, what do Kvaldir Raiders, Mukla's Champions and Murloc Knights do, not to speak about Thunder Bluff Valiant and legendaries. And joust is seen as a gimmick.