I haven't tried the Macadamias so I can't really compare, but I can comment on the Smooch sandals.
I don't want to put them down because they ARE comfortable and I do wear them regularly. But, I have not found them as comfortable as my Brulees, so if I know I will be doing a lot of walking, the Brulees are my preference. Something about them is different. The toe area is pointier and doesn't quite work with the shape of my foot. I find that as I walk, my feet tend to slide off on the outside sole, and I have to push them back into place. That probably makes no sense and I am not sure how to describe it in a better way, but it can be annoying. My foot just seems to point in a different direction than the shoe. This also causes it to be a bit unstable--I have turned my heel a few times in them.
Since the Macadamias appear to have a much wider sole, my hunch is that they would be better. But as I said, I haven't tried them to know personally.
