Yeah all of a sudden the whole internets seems to agree now that there's no real difference between the cables apart from the locking clip (which obviously won't affect speed). I got both types with some motherboards though and always used the ones with the clips on SSDs. But apparently they should all work, as long as you plug them into the fast ports.
Also check that you're not comparing sustained with MAX speeds or vice versa. Only look at sustained - actual vs claimed.
Also check that you're not comparing sustained with MAX speeds or vice versa. Only look at sustained - actual vs claimed.