It may or may not be. We should definitely try and see what results we get, but it's not guaranteed to be better.
Same goes for Lei-Shen. While it might look great from eyeballing, it might end up not being that great with the low proc rate and duration.
For the second trinket, with the stats given here, i'm going to have to say Cha-Ye is going to beat everything else to a pulp. It already gives over 100 int more than Wushoolay's, and that's without its own crit.
So the only real question is Lei Shen or Wushoolay.