Neither are a good investment if there are not able to do their job properly.
We have always used a conveyance (Paul Denny in NSW) and all transactions have been dreams.
He has even worked on properties outside of NSW.
At the end of the day,if you do use a solicitor, just ensure that they know what they are doing and make certain that they will not flick you over to their "girl" who would be a licenced conveyancer but charge you his rates.