Well, that is true! But the rent in Ramanathapuram is a little lesser than what you’ll generally find in Avinashi Road. The rent for a 2 BHK is pretty much the same in both localities, between 14,000 - 18,000. But for a nice 3 BHK, you’ll end up paying 25,000-30,000 in Avinashi Road, and 20,000 - 26,000 in Ramanathapuram.
Ramanathapuram is mainly just residential area. There are places of basic amenities around, but if you are looking for an array of restaurants, good multiplex theaters, malls, branded stores for shopping, etc, then Avinashi road will be a more ideal place.