The most important difference is:

Remote viewing is always done within a scientific or an approved protocol. If it is not, then it is not remote viewing.

Psychic information generally comes to someone paranormally, but without any specific forms of control applied.

Therefore, it is possible to be psychic while operating within a remote viewing protocol, but it is not possible to be a remote viewer just by being a psychic.

Remote viewing is:

The ability to produce information that is correct about a place, event, person, or object located somewhere in time/space, which is completely blind to the remote viewer.

Other requirements:

In addition to the above, there are additional requirements:

All persons present during a remote viewing should essentially be blind to the target (except for very specific/restricted forms of targeting material.)

There should be some form or means of validating the material after the remote viewing has been accomplished (checking it for accuracy.)

Differences in protocol:

There are sometimes differences in protocols. The following are examples of differences that have been used in the past:

Outbounder Remote Viewing. Requires a person acting as a beacon present at the targeted site or event.

Associative Remote Viewing. Uses proxy targets to obtain binary (yes/no) responses.

Coordinate Remote Viewing. Uses numeric or alpha/numeric series to identify the specific target.

Precognitive Remote Viewing. Remote viewing that provides information that is predictive in nature, or provides information on a target before it has been selected.

Methods of viewing:

Methods of remote viewing are the forms or styles of viewing that remote viewers or psychics choose to use within a remote viewing protocol. These are sometimes referred to as ERV, CRV, SRV, TRV, etc. Whichever method has been chosen for employment does not waive the requirement for an appropriate protocol to be in force.