Will i be able to tell the difference between an exposed root and sensitive teeth?

Usually the same: Usually, intact teeth are not sensitive unless there is trauma or if you bleached them. It is the exposed roots that are causing sensitivity. The enamel-covered portion of intact teeth is not really supposed to be sensitive to anything. If you have restorations, then leakage or defects in the restorations could be also causing sensitivity.

Visibly -: If you notice the gum has receded at the neck if the tooth, then you are seeing exposed root surface. Gingival recession is sadly very common for a host if reasons. Sensitivity is often secondary to gum recession. Best to be seen by your dentist.

No: One of the causes of a sensitive teeth is exposed roots, other causes of teeth sensitivity are decay, inflamed gums, trauma to the tooth or teeth just to name a few.