Yes! In the same way that his poor record against Australia relative to Sachin also implies that he's much better than Sachin at batting against someone else, somewhere.
My argument isn't that Kallis is somehow better than Tendulkar because he scores more heavily on his home pitches where runs mysteriously count double because conditions most resemble those that were present Back in the Glorious Nineties. It's merely that he's at a disadvantage because of where he has to play his home games. All batsmen have these advantages and disadvantages relative to one another. Tendulkar had pretty friendly home conditions, but he also had to play for longer against some of the best bowlers around. Ponting was part of a winning team, but he's also been burdened with captaincy for a huge chunk of his career. Kallis's disadvantages, given how much less popular he is, tend to receive a lot less attention than Tendulkar's or Ponting's, and since playing home games in South Africa is a huge disadvantage relative to those two I thought pointing it out would correct that a touch.
You should be aware of how little I care for weighing these advantages and disadvantages off against each other though. I don't think there's any conceivable way to decipher them, and I certainly don't think "watching them play" is a good way of trying to make up our minds on the subject when the margins are so fine. Cognitive biases are just too damn strong to even make a wild guess, and trying to do so would make cricket really boring. AFAIC, if they've both scored a similar amount of runs at a similar average over a very long period of time, they're round about as good at batting as each other. Given that, Kallis's bowling makes him a much, much more valuable player than any of the batsmen that he averages within a couple of runs of. And that's the source of my Kallis-love
.