However, this match will determine who deserves to be at the top because both have points that are not far apart.
Most likely I will bet on BTTS.
As you said, it is true, this match is advantageous for Napoli because they have time to maintain their stamina because they have a relatively long rest period compared to Inter Milan. However, Inter also has the advantage of playing at home, and of course the support of their own fans will be an extra strength for Inter Milan. In addition, Inter gets additional support in the form of pressure and intimidation from the audience.
Even so, Inter should not underestimate Napoli because if they lose this match it will be difficult in the next match. Conte will certainly immediately evaluate the team after the painful defeat in the previous match and wants to use this match to stay at the top of the standings before the international break. With all the analysis above, I am sure this match will end in a draw, because of course both teams will play very carefully in this match so as not to lose points.