I would say if we were to compare the overall performance of Juventus and Lazio this season right now then Lazio should come out on top. Lazio won 4 out of 7 matches, Juventus won 3 matches. Juventus' defense is strong and they have managed to occupy the third place in the table. And the team has not lost a single match yet. But I am not satisfied with the gameplay of Juventus.
Had Logio's defense been a bit stronger, this team might have been fighting for the top spot in the table. But Lazio's defense is quite weak. Lazio conceded 11 goals in 7 matches. The defenders must play well if they want to win against Juventus. If the defenders perform poorly, Lazio are also likely to lose. Because, it will be very difficult for Lazio players to break the defense of Juventus. Both Lazio and Juventus will probably try to make the match a goalless draw.
While it's true that Juvnetus won less games, they also never lost, whereas Lazio lost twice. The defense of Juventus is so great that we are not seeing them losing any games, the worst case they are just getting a tie. And I believe this is one of those situations, they won three times, and they got a tie four times, and while they may not look great, they are the same points as Lazio. Whereas, Lazio had 4 wins, and just a tie, and they had two losses which is not really looking great for them.
I believe Juventus will end up getting the win here as well, they are not going to end up losing to Lazio and get their first loss here, I doubt they are going to be careless like that. They are looking good and will continue their run.