In their first clash this season (1-1), Leverkusen had a bit of a dip in performance, they had a few games in a row that ended in draws. Plus, Bochum had a home advantage.
In the previous season, Bochum got demolished by Leverkusen twice: first 4-0 in the first half of the season and then 5-0.
So if we want to consider the most recent head to head results, Leverkusen is rightfully a clear favourite.
But let's not forget that Bayern has a much better goal difference than Leverkusen (currently +51 Vs +26) so, in practice, Leverkusen has to make up 7, not 6 points to win the league.
That is great breakdown of Leverkusen vs Bochum game. Leverkusen has not been playing well lately with a lot of draws in row. But they have beaten Bochum easily in their last two meetings. As you said we also need to think about how teams are doing this season and how many goals they have scored and allowed. Leverkusen has scored 26 more goals than they have allowed but Bayern has scored 51 more goals than they have allowed. This means Leverkusen needs to make up 7-point difference not just 6 to win league. This makes things more complicated and shows how hard it will be for Leverkusen to win title.