Noticeable differences--check the review.
*MAC is not cruelty-free according to Cruelty-Free Kitty and Morphe is certified by Free the Bunnies. Makeup Maven, Kayla, says: MAC 135S is $42 while Morphe M527 is $17. MAC has synthetic bristles while Morphe has natural bristles. Both are meant to be powder brushes but Morphe also suggests to use the M527 brush for bronzer. That is exactly what I use it for. The handles are very similar in thickness with Morphe being a smidge thicker. They are both comfortable to hold. The online photos of these two brushes do make them look very similar (tapered flat paddled brushes) and when I first got the Morphe M527 brush they did look quite similar. However, after a bit of use, the Morphe bristles spread out making it much longer in appearance than the MAC brush. To be honest I kind of like it that way. Applying bronzer with this brush is probably my favorite part of my routine. This brush picks up a decent amount of product and blends out my bronzer effortlessly. There are complaints online about the Morphe brush shedding and while it does happen occasionally it doesn’t happen every time I use it so it isn’t a deal-breaker for me. The MAC brush is much flatter compared to the Morphe brush and trying to apply bronzer with it is kind of frustrating because it has such a precise point laying down the product. & because of this, it is difficult to blend the bronzer. I thought with use it would spread out like the Morphe brush but so far it hasn’t - maybe with more time it will. I will say though that the MAC brush is much softer compared to the Morphe brush & has no shedding. So, because of all of these differences, I would definitely say that the Morphe M527 is not a dupe for the MAC 135S. However, with that said the Morphe M527 is a fantastic bargain and I do not think that the MAC 135S is worth $42.