It does indeed look alot like it, but its not an exact copy of it mate.
Compared to what you have done, you are selling the exact same script as Chezza, argueably worse. For an higher price?
My script was definitely inspired by Core’s script but it is in no way a copy of it, and the entire reason I made it is because people liked his UI and asked me to make a revamped version of it, but obviously made by me instead of him since he isnt as active anymore. There are lots of differences, especially code wise (such as performance etc) and also in the design.
You could go ahead and read this comment if you want to see the exact reason.