Basicly, yes, its the same concept. Different people back different formats. Luckily, they are not
too different. Nothing like the battle of HD-DVD and blueray that may happen.
I generaly use +R, because it has the ability to use bit-setting. Some DVD players have problems reading -R/+R disks. The "bit-setting" allows the disk to lie about what format its in. So you can get the disk to say to the player "Hey, im a DVD-ROM". The DVD player then trys to read the disk as a normal DVD, which almost every player on the market will do without a problem.
-R media do not support bitsetting, although, more players seem to like -R over +R when you dont have the ability to use bit-setting. It depends on your DVD writer if you can support bit-setting.
For data, i go with whatever i have the most left of.
As for the disks themselfs, ive had good experiences with Ritek and taiyo yuden. Infact, you'll pretty much find that everyone has. They are two respected makers.
Get your disks from
http://www.rambox.co.uk/ They are only 10 mins from your house too. I go there often. Pretty much everything they stock is quality stuff.
Dont buy cheap media, it will all go wrong, even if not right away.
Two links i promice you'll need :
http://www.dvdshrink.org/
http://www.dvdinfopro.com/
Feel free to catch me on MSN if you need help on other stuff