Hand calls, 99%+ of the time, though I carry an ecall on every hunt.
When bobcats are the target, I'll use the ecall, just turn it on and let it rip until the end of the stand
My hand calling sequence is about 20 seconds of sound, then stay quiet for 3-5 minutes. Repeat.
I hunt wide open, sage brush country and have watched coyotes come in from way beyond my lasers range, a Leica 900, so having them bust me for movement with a handcall is probably minimal.
Hunting in heavy cover, I can see an ecall being helpful.