Maybe the composer wrote multiple versions? Maybe it was adapted differently for different artists? Who knows?
I haven't compared the lyrics, so don't know how extensively the differences are. Both versions have the same writer/composer credits. I'm not sure why it matters to you so much, other than a curiosity about the differing versions...
I'm not sure what this has to do with a creative commons licence..?
Edit: of course, should have looked at Wikipedia:
"Some Guys Have All the Luck" is a song written by Jeff Fortgang, which has been a Top 40 hit on the Billboard Hot 100 twice, first by The Persuaders in 1973 reaching #39, then by Rod Stewart in 1984, whose version hit #10. Stewart's version incorporated a vocal refrain from "Ain't Got No Home" by Clarence "Frogman" Henry. The Shakers recorded it for their debut album Yankee Reggae (Elektra, 1976) and released the song as promo-only 45 rpm single.
Fortgang wrote many songs during his three years in the music industry after graduating Yale in 1971, but sold only this one (other than several public service radio spots on topics such as alcoholism and VD). He went on to get a PhD in Clinical Psychology, and still works in the mental health field in the Boston area. The major hit by Stewart arrived after Fortgang was well into his psychology career. While Fortgang would eventually release a solo album in 2013, titled All the Music in the World, consisting of the demos he had created in the 1970s, "Some Guys Have All the Luck" was not one of the tracks.
Other artists who have recorded the song include Robert Palmer (UK #16 in 1982), whose version had a significantly altered melody and lyrics, as well as a number of reggae artists, including Junior Tucker, Derrick Harriott, Camera Obscura, Jacob Miller, Judge Dread, and the Shakers. Rod Stewart began using the Palmer-style arrangement in live concerts in 2003 after Palmer's death as a tribute, with live female backup vocalists and a horn player wearing identical dresses, similar to Palmer's signature music videos.https://en.wikipedia.org/wiki/Some_Guys ... l_the_Luck