Like the right to talk outside the penalty of perjury for their defence of course. Since small claims don't have to use actual lawyers, they are not subject to all the enforcement that lawyers are subject to, so I guess the system is not as rigorous. I suppose the discovery is mostly an artesanal process while in a real court it is a highly reagulated thing where the lawyer's ability to work in the future is on the line.

For example you don't really have a special agent interrogating the defence in a small claim court, so that's one way for perjury not to be a factor.