Did Sangam Tamil sound like Tamil or Malayalam?

 If one see Sangam Literature in Space & Time, it is nothing to do with Malayalam.

It is too specific- of Tamil around Madurai region only.

Time: Most scholars suggest the historical Sangam literature era spanned from c. 300 BCE to 300 CE.

Space: Around Madurai only- no other region of present geographic boundaries of Tamil Nadu can take a claim. Where is the question of Malayalam?

Legends: The Tamil tradition and legends link it to three literary gatherings around Madurai and Kapāṭapuram (Pandyan capitals): the first over 4,440 years, the second over 3,700 years, and the third over 1,850 years before the start of the common era.