It must be a software thing then. That's bizarre! I've attached a comparison between Krita (left) and Clip Studio Paint (right) and it's literally night and day. Both versions (IronRust & Firefade) are the exact files are from the most recent update. I don't think there's anything you can do on your end, since the files aren't broken, it's just CSP I guess? Wild. 
SynthGoblin
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A member registered Jun 09, 2020
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Hi, I have what might be a silly question but hopefully it'll help out others who are new to texturing like me.
The Photoshop texture files across the board seem MUCH darker than the blender pngs that are applied to the model. I'm just editing the base color layers so I can retain all the shadow/highlight layers you've included, but should I be keeping them dark or should I bring everything up to the same light value as the png textures? Not sure how it would look with shaders, so if I can avoid having fur like a high-vis vest that'd save me some time haha.
As a side note, your files are also very tidy with all the masks and layer folders which I greatly appreciate, so kudos for that!