There is a saying “steal like an artist” and as catchy as it may be, I believe it is misunderstood. We are all the average of the five people we spend the most time around. if you look at artists that spend a lot of time with the ideas of artists that inspire them, then it is easy to see how these inspire similar works from them.
When looking at art there can be said to be a wide variety of styles, mediums, genres, and sub-genres. To say all of this can get noisy is an understatement. It is most easily seen in a poorly laid out gallery that mashes them all together as a collage of chaotic pieces with nothing in common.