No, the Roman deities aren't just the Hellenic ones in a new wrapper, they're distinct from each other.
In fact, many Roman gods had different functions before they syncretised (got infused) with the Hellenic pantheon! For example, Mars used to be a protector of Rome and it's agriculture before he became associated with war due to his syncretism with Ares.
Plus, many deities have existed long before the city of Rome was even founded. For example Juno and Minerva: they're originally etruscan deities going by the names Uni (Juno) and Menrva (Minerva).
And also, some deities do not have an "equivalent" in the Hellenic pantheon. For example Janus, the god of beginnings, gates, transitions, time, duality, doorways, passages, frames, and endings. Yes, he may be similar to Khronos, but no, he's not his "equivalent" (also since he exists since etruscan times).
— PSA from a greco-roman polytheist















