It depends on the strength and capabilities of the drawn creature
Supposed Kanjuro draw Kaido, would the strength of the drawn Kaido be just a fodder lvl strong or just be based on the strength of the DF user Kanjuro himself ??
We don't have enough evidence, the strongest character he drew is Oden, and he lacks good feats (though he killed Shutenmaru with bombs)
The dream monster doesn't have good feats either, just the jobber giant making them look good.
Kanjuro could have created the same giant monster too
But ig the disadvantage would be Kanjuro would need time to draw such gigantic monster where Kirin could make them spawn several of them at a time..
Same disadvantage for Kirin would be, you need to depend on ppl dream
So at the end I'd choose Kanjuro if the strength of the drawing isn't necessarily weaker than the same type of characters spawn by Kirin