What's the difference?

Which would be better for solo sailing? (fancy 40 footer - as Mr C said)
I see some have snuffers and others have a furling system.
Can any be left up when not in use?
It would be nice to have a light wind sail that didn't require a pole.
Now, I already have a spinnaker with a sock but for some reason it always goes up when the wind is down but the wind always comes up before I get it back down. It would be nice to have something that's easy to handle. Also I hardly ever run square as its not very comfortable and down wind tacking is more my style.
Any other sail suggestions would be welcome.

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