When we focus on the place of articulation for consonants, as in table, we can see that [t] and [s] are similar in that they are both voiceless alveolars. But they are clearly different sounds. The difference is in how they are pronounced, or their manner of articulation.
=> Both [t] and [s] are voiceless alveolars, but their differences lie in their pronunciation and articulation.
The [t] sound is a “stop” consonant and the [s] sound is a “fricative.” An analysis of the manner of articulation of English consonants is presented in Table.