Hi Etienne,
There is no difference in the output / scaling between the DisplayLink DL-165 and DL-195 chipsets - they are the same design with a slight difference of highest resolution each supports:
DL-165 DL-195
1600 x 1200 1920 x1200
1920 x 1080 1920 x 1080, 2048 x 1152
The display output of Genos, and PSR-S970, which I both own, is 800x480, which is supported by DL-165 and DL-195. I have USB 2.0 display adapters with DL-165 and DL-195 and could not tell any difference on 1920x1080 external monitors for Genos.
The fact that you are not satisfied with the score screen is due to the scaling of 800x480 display output of Genos to your external 1920x1080 display. You like the way how your Tyros 4 scaled 800x480 to 1920x1080, but do not like how your Genos scaled 800x480 to 1920x1080, whereas the guy in the other forum likes how Genos scales its external display output better than the Tyros.
I do not own any Tyros before, so I assume the Tyros resolution of external display output is also 800x480.
Since we cannot change the way how Genos scales its 800x480 resolution to 1920x1080 external display resolution, I ran some tests on 2 different external monitors using the same Plugable USB 2.0 to VGA/DVI/HDMI display adapter (DL-165) to see how these monitors handle the 800x480 video output of Genos.
I had a Dell S2240T 21.5-Inch touch screen monitor on the music stand of Genos, and a LG 24MP88HV-S 24-Inch IPS monitor on a standalone heavy duty music stand just above the Dell monitor:
https://photos.app.goo.gl/mpRwVviJCKZXSXI62I selected a MIDI song "Bridge over troubled water" on Genos, here is the 800x480 screen captured directly on Genos:
https://photos.app.goo.gl/tr6qqiycUGIZXE0q2Here is the picture I took on the Dell monitor:
https://photos.app.goo.gl/G9yk0PDvXfmxanbB2Here is the picture I took on the LG monitor:
https://photos.app.goo.gl/CLclrSpu5GfyPpmx2There are some subtle differences on how these 2 monitor handle the 800x480 resolution video input from Genos, but they are so small that we can simply ignore them and assume them to be identical.
As a comparison, I loaded the same MIDI song on PSR-S970, which has screen display very similar to the Tyros.
Here is the 800x480 screen captured directly on the S970:
https://photos.app.goo.gl/u8sE1KcNlf9b4x713Here is how the LG monitor displayed the 800x480 resolution video output of the S970:
https://photos.app.goo.gl/Pk8HjEPm6xqs4F8Z2I compared the score outputs of the Genos and the S970 and found that the score output scaling on the S970 is slightly smoother than the Genos, with slightly less noticeable jaggedness. The slightly meatier fonts on S970 also helps the output to be slightly smoother in appearance than the thinner fonts used on the Genos.
I hope the above answered your questions. You can contact Yamaha customer support about your dissatisfaction on the Genos score screen display and request for better on-screen score presentation.
You might also want to explore the possibility of using your Genos to display score using external apps like SongBook+ on iPad Pro 12.9, or similar app(s) on Android tablets, with score in PDFs instead of MIDI files.
Thanks,
Paul