A trap in the Alapin Sicilian

Here's a nice endgame grind by GM Lubomir Ftacnik. He finally captures White's isolated d-pawn on move 32, and White resigns 22 moves later. However, White had a huge improvement on move 8. Do you see it? If not, please consult Vasiukov-Razuvaev, Polanica Zdroj 1972.