Ok I thought I was going a bit crazy regarding image sharpness so I decided to do some A/B tests with my Pi2Jamma (Raspberry Pi Jamma Interface) which runs super resolutions 2560x240 and test it against my Groovyarcade Rig (ATI 4550 & vga cable to JPAC)
The results are quite obvious.
The Pi2Jamma looks sharp, you can almost count individual pixels.
With the Jpac the image looks soft, almost like it has anti-aliasing on.
and this should prove my GA machine is in 384x240
Have i done something wrong?
https://imgur.com/gallery/87j9lTBAs you can see in the final pic of that album i took a mame screen grab