to me, capture sharpening isn’t a specific “function” built into the software, but rather a sharpening step in a multi sharpening workflow as taught by Bruce Frasier along with the others from Pixel Genius such as Jeff and Andrew. Capture sharpening is extremely subtle, and to me a vital step in any good workflow. It’s purpose is to remove softness introduced by the digital process, such as from anti alias filters and such. Lightroom’s sharpening functions to me are primarily capture sharpening oriented, and for most people the defaults will serve them well. Over sharpening a full image may easily lead to that over crispy look. You could turn all that off and then head to photoshop to “capture” sharpen, the follow that with creative sharpening, but I think LR does a great job so to me that’s just more work.
The ability to use masking can also make it a very useful creative sharpening technique, and in fact I’ve on occasion used it on the tiff file that comes back from Lightroom. For creative sharpening, applying additional sharpening in a local adjustment can also works OK,(it would be very useful if you could also used the other properties of sharpening, especially masking when adding sharpening to local adjustments. ) So usually Photoshop is a better tool for creative sharpening and LR is better suited for the subtle yet necessary step of capture sharpening before you sent the data over to PS.
I tend to use Focus Magic quite a bit, whether that can be considered “capture” or “creative” I’m not sure, since it is also very subtle. But it’s always a second step in sharpening, I don’t turn off LR’s sharpening so Focus Magic can do all of the sharpening.