Will my raw images look the same in Adobe Camera Raw and Photoshop Lightroom 2?
Yes. Photoshop Lightroom 2 leverages the same core Adobe Camera Raw technology used in Photoshop CS4. This means that not only will raw images look the same in either application, but also that changes you make in Lightroom can appear in Camera Raw and vice versa. To complete this interactivity, changes in both Camera Raw and Lightroom need to be written to XMP metadata. This is so that each software application can recognize the other’s edits. This functionality is set in the preferences in each product.