Hi [USER=137395]@ogremydeadbody[/USER]
It would probably help forum members if they had access to your files to give the best recommendations via a file sharing process.
Without that here is my best thoughts on causes and things to try.
With Photoshop being pixel focused there is likely some issues where in the conversions you are not getting the best results. Here are some thoughts to make that a bit smoother
1) Make sure all components are natively in the same color mode e.g. RGB or CMYK and not a mix. Conversions between the modes can create issues
2) Make sure that all components are natively in the same color space e.g. if RGB using sRGB or AdobeRGB etc. Otherwise conversion between color spaces can create issues
3) It apears you have PS set to a large enough set of pixels so that should not be an issue yet enough pixel resolution is important as well
4) Make sure when you bring the AI vector file into PS, do it via the File > Place Embedded command. This will bring the AI object directly into PS as a Smart Object so when you resize etc, it whould go back to AI it doing the resizing and give you the best resolution
There can be other factors that come into play such as viewing conditions. Always view at 100% magnification or larger and preferablly at multiples of 100% magnification to help avoid display artifacts.
Also, PS can create display anomalies whne working with PS documents fo multiple layers (details not provided). To avoid those anomalies, create a stamped Layer of all the Layers and again view at mulitples of 100% will avoid those types of anomalies.
I would give those steps a try and it you don't have good results, then please post the files for examination by forum members to help search for the issue
Hope his helps
John Wheeler