It would be actually impossible for LoL to be more difficult than Smite, sorry.
When I went to LoL I was actually laughing at how pathetic it was to play, it was way too easy. I was rocking the enemy team and I was definitely building like an absolute derp because I wasn't familiar with the items. Obviously I was in noob-zone, but it's easy to tell when you play that nothing in the game itself requires skill, it's all knowledge. Hitting with skills is simple. Characters with supposed "skillshots" are a joke, considering the simplest Smite abilities are harder to hit with than LoL skillshots.
The perspective changes everything, and the fact you're also stuck to your character and therefore reliant on your team for certain info also makes the game a better team game. It also allows for real ganks and not this retarded "hide in tall grass" shit.
and someone mentioned LoL is slow. A-freaking-men to that.
LoL has more characters, and that's about all it really has going for it.
Oldschool mechanics wise, DOTA2 stomps LoL. Everything feels so much better in DOTA2. (edit: though actually I like that you can have the camera stuck to you in LoL, I can't stand moving it myself and DOTA2's is very volatile in stuck mode)
Overall Smite is still the champ. It's obviously not the best and it's still changing, but the fact Hi-Rez are meticulously shaping Smite to be a proper game shows a strong dedication to their game that clearly shows why it's the only other popular MOBA out there that isn't LoL or DOTA. It requires vastly more skill to actually play well and you can really feel immersed in what is going on as opposed to LoL or DOTA where I feel so detached from the action thanks to the perspective and control scheme.
Also playing as gods > champions or whatever the heck LoL calls them.