Presets downloaded from PixelPeeper won't always give you the exact same look like the original. The look of a photo depends on many
factors, including the camera model, lens, exposure, white balance etc. You will always have to adjust the settings
based on the photo you're working with.
However, if there's a noticeable difference in colors and tone, it's very likely due to the Look or Camera Profile.
Looks are special types of effects that aren't based on sliders and Tone Curve. They can't be exported in a preset file.
These files have to be installed on your computer separately.
Examples of such looks are film emulation packs, like The Archetype Process, or camera color profiles, e.g. Fuji Classic Chrome.
PixelPeeper will show you the name of the look, but it won't include them in the preset by default. Use the "Full XMP Settings"
preset version if you have the looks installed on your computer — otherwise Lightroom won't be able to import the preset file.