TMS320TCI6618 & TMS320C6670 are both communications Infrastructure KeyStone SoC , and the performence are almost the same with ecthother.
so.... why ti give them unique name?
regards.
http://www.ti.com/lit/ds/symlink/tms320tci6618.pdf
http://www.ti.com/lit/ds/symlink/tms320c6670.pdf