Sandy played the heavy end of 500 games for us. Most games he was a 6/7 with the occasional 8/9. This was a guy that played in two world cups, won a couple of trebles and a European medal.
Tavs a guy that's never won a medal and came to us from Wigan because no English team wanted him. That's why we get loads of 4/5 games and the occasional 8/9.
Inconsistency is the bane of the ordinary player.
Not being as good as the great Sandy Jardine doesn't mean Tavernier is ordinary.