Each raw converter has it's own 'look', but there's not a great deal between them these days. As an example, IMHO Capture One does a slightly better job of handling really extreme white balances (i.e. 16'' temp, -5' tint), although you could probably match it in LR with the profile editor. However LR's noise reduction is much better, so everything's a trade off. DXO has built in automatic lens correction which can be handy, but I'd assume LR will add that in the future too.
[quote author=Replytoken link=topic=8776.msg59'65#msg59'65 date=1262213532]Unless you enjoy learning about different programs, it is probably best to focus on using one program until you are skilled enough to know what it will or will not do for you.
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I'm with Ken on this. Stick to one for now, learn it inside out, and then you could think about adding other tools if you feel the urge to do so. I use different raw converters on occasion if the situation calls for it, but usually under duress, because I get far better results from a program (Lr) that I'm comfortable with.