They were but they are considered Superior with the PlayStation versions due to having a superior frame rate and sound quality, although they sold rather poorly at the time as Resident Evil the remake kind of raised the standard for what a remake should be up so high, that no re-release has been able to match it in quality. Not even the other remakes in the same series.
In many respects the remakes of 2 and 3 are a measurable downgrade, and are more accurate to a retelling than a remake, which is why I would want enhanced ports of the GameCube versions