Chabad.org — English translation + Rashi
Torah Temimah: “על מצות ומרורים יאכלוהו” — the second Pesach requires matzah and maror just as the first does.
English: “They shall eat it with matzos and bitter herbs” — as with the first.
Parity of eating requirements — the second offering is not a stripped-down version.
What is eaten with the korban on the first night is eaten with it on the second opportunity as well.