I believe that clip studio paint brush was converted from this photoshop brush. I think the main reason why it looks so different is because PS and CSP both has the texture applied “per-stroke” instead of “per-tip” like Krita does with textures by default. Like this example I made shows. Flow is disabled. This brush mainly gets that effect having the opacity pen-pressure enabled.
When “per tip” is enabled they all look very similar to the way it looks in krita. And you can see that every the program does height a little differently from each other
I tried to edit it to create a brush that works somewhat similar. Just put the gbr file in the /brushes/ folder and brush preset in the /paintoppresets/ folder. I don’t think creating bundles works in Krita 5 yet
These new texturning modes are such a big improvement! 
And I’m glad the softer hard mix mode was added too! It does look a lot closer to how photoshop renders hard mix textures.