Inter-state Regionalism:

Inter-state Regionalism:
It is related with state boundaries and involves overlapping of one or more state identities which threaten their interests. River water disputes, in general and other issues like the Maharashtra-Karnataka border dispute, in particular can be cited as examples.
Intra-state Regional Politics or Sub-regionalism:
This refers to regionalism which exists within a state of the Indian Union. It embodies the desire of a part of a state for the identity and self-development. It may also reflect a notion of deprivation or exploitation of a part of the state at the expense of another.
This type of regionalism can be found in many parts of India. The important examples of this kind of sub-regionalism are Vidarbha in Maharashtra, Saurashtra in Gujarat, an East U.P in Uttar Pradesh.