Did Nelly Jack "Stepped On My J's?"

There is a lot of drama going on between Nelly and a rap group that goes by the name of Da Banggaz314. Apparently, the group is signed to Atlantic Records/7Fourteen Entertainment and they are claiming that Nelly jacked their song, which shares the same name as Nelly's. The group claims that back in 2006, they came out with a mixtape, which had a song on it titled "Stepped on My J's. They garnered a lot of feedback for the song and were eventually signed to Atlantic Records. Da Banggaz314 claims that Nelly did not steal the song, but instead they state that he stole their concept. Personally, I don't believe that he jacked the track, especially if the phase is commonly used. What do you guys think? Listen to both of the tracks below. At first, you will hear Da Banggaz version. Then, you will hear Nelly's version at the end. Let me know what you think. The songs sound totally different to me. It is definitely possible that he stole the concept since they are both based in St. Louis. However, do you think that they have the right to sue in court?