Fishhunter:
The spincasts do retrieve faster for second shots and are good for fighting big fish, but the bottle is simplicity itself.
That the big difference right there, and as Carpsniper said, it's going to cost you about the same for initial setup with either the Retriever or a spincast (nice pot stirring Fishhunter). The spincasts give you the advantage of fastest retrieval due to the gear ratio, and have a drag setting that the Retrievers don't have, but the Retrievers are hassle free (no bale release button to remember to push, no anti-reverse gears to scramble, and it won't break).