Well, raw code maybe PHP, PHP Framework, java, Js or somethink else.
The raw code is
- custom, tailored to the needs of project
- mayby more secure
- maybe more flexible
- needs more time
- needs more money to be paid
- and more
Wordpress
- has security plugins
- needs less time
- better UI
- less money to be paid
- maybe conflicts in code of plugins
- a lot of tune, cash plugins e.t.c.
- and more
So it depends on you, your budget and your plans.
