The Suicide Squad is to Suicide Squad what McDowell's is to McDonald's. Suicide Squad had Deadshot, The Suicide Squad has Bloodsport. Suicide Squad had a computer generated anthropomorphic crocodile, The Suicide Squad has a computer generated anthropomorphic shark. Suicide Squad had a Latino character who could control CGI flames, The Suicide Squad has a Hispanic character who can control CGI rats. Et-fucking-cetera.
These minor differences only serve to emphasize that the only real difference between this movie and its predecessor is a definite article in the title. Even the quote-unquote new characters serve to preserve the status quo, as their introduction allows writer/director James Gunn to repeat David Ayer's formula from the first film: Amanda Waller (Viola Davis), who is clearly a bigger sociopath than any member of the Suicide Squad, scrapes the bottom of the DC barrel for characters who go from feeling sorry for themselves to feeling sorry for each other.
But there is something that The Suicide Squad has that Suicide Squad doesn't: an odd habit of unnecessarily doubling down. Thus, we have Peacemaker, who is interchangeable with Bloodsport does. Or Weasel, a humanoid weasel who is interchangeable with Pete Davidson, a weasely human (Davidson is possibly the only person more annoying than Margot Robbie; thankfully, his character gets his face shot off early on, which actually makes Davidson less grotesque to look at than usual).