The way I'm seeing it the problem is Shimano puts the bearing inside the cup and sunrace puts the cup outside the bearing.
While not a deal breaker, it complicates any easy peasy swapping like press on press off.
You might have to look at Italian alternatives to Shimano like Chin Haur.
http://www.chinhaur.com.tw/upload/1493277293_9473.pdf
Shimano does make them in Italian.
https://www.universalcycles.com/shop...s.php?id=44899