The match I'm curious about the most is Lazio - Udinese now. I wouldn't expect to say such thing before the season started.

But now we are seeing these teams doing a great work in the league. They are nearly the same taking their statistics into account. The only visible difference is that Lazio conceded 5 less goals than Udinese so far. Even their head-to-head match history is very balanced considering the recent ones.
However both of these teams have made a huge improvement this season. Especially Udinese's effort is the most surprising one because we haven't seen such start from them for many years. Although Lazio are favoured by bookies I don't want to take that risk. As they are both comfortable about scoring goals these days, I'd prefer BTTS.