then also try right clicking the track(the green part) and reversing it, sometimes this makes the sample sound different while still being in key and such.
This one is better, but i would consider taking the two similar melodies and making them go back and forth at the end maybe. yeah the song was definetly good except for the end which seemed out of place. Another suggestion is when you are looking for samples if you like something see if the same uploader has different parts that go with the same song of theirs, This way you can get a song that sounds similar throught the hole thing for example
balls of steel