There are 50 spaces available for titles - period.
~ The 'edit' space has 50 in one block.
~ The 'create thread' has 50 in the form of up to 10 for the prefix. I belive 'Tune Req: " has 10.

If you want the options to be exactly the same, it means an end to prefixes. I think more people like having that than not and prefixes are available because people asked for them.