I haven't played Tainted Kingdom yet, but I do plan to very soon. Also, even though both are from Krin it's very hard to make a game that's better then Sonny. I'll also post here once I've played Tainted Kingdom to actually say my opinion.
It depends on what you like though, they're both in completely different catagories
Tainted Kingdom is a well made new Strategy game, so it's bound to have a few glitches, Sonny, on the other hand, has been updated a couple times and is a RPG(i think that's what they're called!) When comparing them animation, story, and gameplay though, I'd have to say Sonny, the animations are quite the same, Tainted Kingdoms is a little less i think but it's got a good story, as does Sonny, then again, Sonny has nicer gameplay, as Tainted Kingdom can be a little annoying when you drag a unit onto the circle and it just disappears or something odd happens.
