I don't think we need to exaggerate with "same players" - there are similarities, but even looking at both in their prime, there are also significant differences. In the bottom line (as many times it is, despite it being less sexy to talk about), the biggest difference is that one is a top professional, and the other is a low life.
If Hleb had even a bit of Yossi's character, he'd have been an awesome player.