I like the old R89 that I got from Tony and I agree with what other guys have said, it is quite an aggressive razor. It needs a slow hand an an easy touch. ;-)
However it gives a close, close shave. Not really for everyday use as I found my face feeling a little tender after a week or so but of course I shave in the morning before work (as I'm sure the majority do)and I'm normally half asleep. Sometimes this makes me a little sloppy and heavy handed.
The R41 though is lighter, and gentler with what I think is the Merkur OC head. A nice shaver, looks good and is well put together. These make good daily shavers IMHO.