Its far more reliable and often faster i found and takes less of the PC's CPU.
A "B" type Ethernet Cable will have the wires in this order when looked at with the catch facing away
o Orange/White
o Orange
o Green/White
o Blue
o Blue/White
o Green
o Brown/White
o Brown
The other end is "A" type on a crossover which I always forget the colour order of but its different, but on a straight through cable, both ends are A type or B type (usually B type) but on a Crossover, one is A type and the other is B type. Hope thats not too confusing