Like I said, in motion, scanlines, artificial or not, are not visible. Still shots make them very obvious, similar to taking a photograph of your old CRT/LCD TV. Don't worry about that. Everything retains its detail, and with certain dotmasks, even gains the illusion of higher detail on 3D models.
I've reinstalled the Steam version. Here's how this looks on PC, with slightly different scanline settings:
Say for the 16:9 hack in PS1 emulation, it looks near identical now, doesn't it?
Like you reported on the ReShade forums, there is a slight incompatibility issue with Aali's custom driver. At resolutions higher than 1600 x 900 (I use 1080p, but my image host resizes the images), between 20 and 40 pixels will be cut out, making the black border larger. Additionally, it will make artifacts appear in that field, like seen above. This also only happens in fullscreen mode.