Krell kps28c

Hello, I currently have a Kav 300 cd player in my system. Would I see a big Difference in sound if I went to a Kps28? I would not be using the cast" feature
I am not familiar with the KAV 300, but I have owned the KPS28. The latter does not compare with a Krell 20i.....not even close. The 28 was a huge disappointment; I sold it very quickly. I assume it sounds a lot better with cast connections.