Hello and welcome to hcm,
As you asked ,there is no matter which treatment is better,it is the invovement of decay or infected pulp and periapical infection of tooth which decides the treatment of tooth.
If the decay is extended only till dentin
of tooth,restoration is sufficient.
If the decay has progressed into pulp and periapical tissue,get root canal treatment
A thorough clinical and x-ray evaluation will help to rule out the Treatment plan.
Please get further check up by your dentist
aLways maintain good oral hygiene
Prevention is better than cure.
Get dental check-up in every 6 months.