I cannot decide...

Why not just use both? , I think the left one blends in better with the other textures, the one on the right stands out a little too much.

There is third option, lighter version of right. Mortar on it looks a bit mossy, but I think that it's better.

I don't want to make every possible variation like Meo, even without doing that I'm slow on releasing finishing stuff!

I prefer the one on the left,it looks more natural to me,as IS stated the one on the right is perhaps a bit too prominent.

I love the one on the right, but that's just me and my blatant dispassion for flat textures

Although, I think I prefer the third option.