And I think you're COMPLETELY crazy , and you should listen again to Gladiator and Conquest of the paradise
The first bars of Vangelis theme is : A2-F3-E3-D3-C#3-D3-E3-C#3-A2
For Gladiator : A2-D3-E3-F3-E3-D3-D3-E3-F3-E3
Except that the two themes are probably written in the same KEY (with my weak musical theory ) , and share a few chords at the beginning, it's definitely not similar .
The only similarity is at the beginning of each theme : Vangelis goes from a A2 to F3 directly whereas Hans does A2--- D3-E3--- F3
That's just 2 notes in common , A2, F3 , you can't blame a composer for that !
After, the progression is completely different. Hans theme is much more dramatic and "wagnerian". Vangelis theme is more ... spanish, more "fantastic". Orchestrations are different, hans theme is performed by the horns, with male choirs in the background and big percussions . Vangelis theme is performed by "mmmmh" male choirs with a staccato rhythms played by synth strings.
The feeling you get when you listen to these 2 tracks ( opening of conquest of paradise and the battle from gladiator ) is not the same...
Really, I will never, never understand why we always BLAME Hans Zimmer just for "copying" ( not intentional ) 2 notes...
Same thing for this whole "gustav holst" story. Planet mars is written in 5/4 , Hans transformed the theme in a 3/4 frightening waltz and it's definitely not what we call a "plagiarism" .
Why nobody ever blame John Williams for copying Igor Stravinsky and his nutcracker in "Home alone" ( And in that case it's REALLY a plagiarism, or .. hommage ) ? For copying Richard Strauss in Superman ? For copying stravinsky firebird and holst symphony in star wars ???