DEH and 13RW have premises that could be generously called similar, but they go about them in two different ways.
The suicide kicks off the plot in both of them, but while DEH uses it as a catalyst for an honestly pretty cliche Liar Revealed storyline, 13RW focuses much more on the effects of the suicide itself.
Not to mention how graphic 13RW is, in a way Jay Asher's book isn't. The backlash for that is well-deserved but it's not gonna affect DEH.