Homebrew PCBs

Hello all,
I am looking to create my first homemade pcb using the photolithlgraphy method. I've read some tutorials on both methods and did some browsing on the board here, but I still have some questions.

1. Does negative dry film resist share the same characteristic of longer development times for aged film that pre-coated boards have?

2. Does negative dry film resist provide greater detail than positive pre-coated boards?

3. What are some advantages/disadvantages of negative dry film vs positive pre-coated boards besides the following?

-Negative dry film: Lower cost
-Negative dry film: Needs clean board/more steps required

Thank you,
Darren