Comparison of Front rows defence ABs vs Boks

I noticed some interesting stats on defence when you compare the Boks front row to the AB front row in their last tests (as reported in the NZ Herald stats database).

Player

Tackles

Missed tackles

Beast

0

0

Strauss

2

0

Malherbe

7

1

Franks

10

0

Coles

10

1

Moody

11

0

AB front row 31 tackles 1 miss tackle.Boks front row 9 tackles 1 miss tackle.
Advantage ABs 

 Compare that to the total tackles made per team, per match. I suspect the Boks didn't have to make too many tackles in the second halve?