Edit: They finally responded and the cartoonist and his work submitted has been disqualified from that competition.
I recently found out that a cartoon which was drawn just like one of my own posters has won a bronze in a contest in China. The cartoonist is from my country.
The left poster was designed by me 2-3 years ago (2016-2017). The right cartoon won a bronze this year (2019). I uploaded my work on 3 social networks (Coroflot, Behance and Instagram) and pinned one of them into Pinterest as soon as I learned that doing so is useful (which was 2 years ago). Anyone can find my poster by searching Water Poster on Google and Pinterest. Isn't it something that we all should do?
Can we call the right cartoon a copy of my poster? Why? What's the right thing to do in these kind of situations?
Some says using different colors and designs, make the cartoon different. That doesn't sound like a logical reason to conclude it's not a copy. Everyone has his/her own style, even if he/she is using somebody else's idea. If that's the case, can we just get exact ideas from somebody else and change its colors and some lines based on our styles, and call them ours?
I've already read answers on this question. But designs on that page are too broad.
P.S. I'm not saying that the designer copied my work. I'm not sure what's right.