You just get the FSN feed as far as I know, so it's essentially the same.
But the thing I don't like about it is that the size of the image is really small. I'd say it were like 300 x 200 pixels. It's tiny! I'm sure it's bigger than that, though...
I'm getting the digital cable package, Extra Inniings, along with MLB.tv...
If you have a choice and money is no issue, go with Extra Innings. I'm getting MLB.tv because a lot of the Cardinal weekend games are not shown through Extra Innings, because their weekend home games are through the WB... Extra Innings is basically just Fox Sports Net games (unless it's something like the Boston Sports Network or YES...etc).
Erm...yeah, it's just like watching a broadcast on TV. My only complaint is that the size of the window is small. You can make it full screen, but it's extremely pixelated.