The Bulls believe their defence has taken a massive step up since their 4333 defeat to the Lions at Loftus Versfeld three months ago, as they prepare for Saturdays return fixture at Ellis Park.
The Jukskei derby kicks off at 2.30pm in the United Rugby Championship, with the teams arriving in contrasting form compared to their November meeting.
The Lions are unbeaten in four matches, although their last two outings ended in draws. They shared the spoils 20-all with Perpignan in the Challenge Cup in France before drawing 24-all with Ospreys in Wales last week.
