Sky+ is a different thing altogether, i started with a DVD recorder and while OK its nothing fantastic, nothing better than just sticking a VCR with your sky box.
Sky has twin tuners and you can record no matter what the box is doing, whether iot be on standby, viewing another channel, playing back a recording etc. You can also pause live tv at a whim etc. Recording is one touch while in either the search and scan banner or in the tv guide, you just press R on anything and it is guaranteed not to be missed. You can also link the programs so it'll record all of one series completely automatically.
Much much better. Btw £200 for the box? I paid £50, just moan at them about it and they will reduce it.
Cant compare the two though, i have both for when i want a movie off the sky+ onto DVD or whatever, but i never ever record straight from sky onto the DVD recorder.