"splice() alters the array, slice does not."

Which array do you believe is being altered?

"I do not intend this as disagreement."

Fair enough. With what are you not intending to disagree?

"I am just trying to add information to help a newbie choose between implementations."

Well, I suppose we might be able to help with that. What information are you trying to add?

Also, as it may affect the wording, is this generic information for an arbitrary newbie, or did you have a specific newbie in mind?