Well, I’m not sure how Blender converts the color-spaces for the image-texture inputs by default, but with ACES you have manual control over it. It doesn’t make a huge difference (I switched halfway through the project from standart CM to ACES) but I felt that the colors of the textures seem to match better in ACES. Before I had some great hue differences, some red-shifts in the concrete textures etc… They were gone once every texture was converted into ACEScg.
Also I don’t trust the filmic/standart look I want to have a unaltered, linear 32 bit image coming out of Blender, no gamma correction, no color correction - because I do all of these things in compositing.
ACES also made the compositing in AE much more comfortable. I had to deliver an Arri LogC ProRes file in the end, to match the film that was shot on an Alexa. So after getting a linear 32 bit multilayer exr out of blender, I could do the compositing quite nicely in 32bit ACEScg in AE and simply convert the colors in the end to LogC.
And if you look closely, I actually applied a auto-exposure to the animation. It’s just quite sublte