1. Create a new document
2. Import a JPG image inside the artboard
3. Rotate the imported element -25º
4. Go to File > Export for Screens
5. Select the scale 1x and the format JPG 100. Also, verify in the settings that JPG100 has the Anti-Aliasing "Art-Optimized (supersampling)" checked.
6. Export the file.
7. Go again to the artboard and press File > Save for web
8. Select format JPG with good quality (at least 80%), and "Art-Optimized".
9. Click "save"
10. Open both images and compare them, the one exported with "Export for Screen" looks jaggy and with low quality, but the one exported with "Save for web" looks alright. The expected result should be that both looked fine.
Illustrator 24.0 - Windows 10
1. Create a new document
2. Import a JPG image inside the artboard
3. Rotate the imported element -25º
4. Go to File > Export for Screens
5. Select the scale 1x and the format JPG 100. Also, verify in the settings that JPG100 has the Anti-Aliasing "Art-Optimized (supersampling)" checked.
6. Export the file.
7. Go again to the artboard and press File > Save for web
8. Select format JPG with good quality (at least 80%), and "Art-Optimized".
9. Click "save"
10. Open both images and compare them, the one exported with "Export for Screen" looks jaggy and with low quality, but the one exported with "Save for web" looks alright. The expected result should be that both looked fine.