If you look up the definitions of liberalism and neoliberalism I do not see a difference. Both want exactly the same: deregulation, strengthening the ownership of private capital assets, low taxes, no trade unions, reduced government spending, privatisation.
I think the confusion, in part, stems from the fact that if someone proclaims they are “a liberal” it often turns out they care mostly or exclusively for economical liberalism. At least that’s my impression when talking to people.