Hmmm, the first song has a loose concept similar to Suicidal Thoughts, but its poorly executed when compared to the masterpiece that is Suicidal Thoughts. Suicidal Thoughts is a fully actualized version of the Pac song, its also one of the most disturbing, chilling hip hop songs ever recorded.
I can see where Pac would have heard the two lines that reference suicide and come up with the idea for his song. It's not a bite though, since BIG did it in a more conceptual, creative and lyrical fashion. Bigs record is vastly superior, plus the concept was originally done by Scarface.
I don't see the connection between the second record and Everyday Struggle (which is another masterpiece). It's funny to me that you're putting Pac's D grade material up against Brooklyn's finest's finest.