Considering each palette have different shades lets talk about each palette separately.
Radiant from bottom to top shades.
The first shade in Radiant from bottom is a dark bronze metallic shade.
Second shade is very light cool tone pink shimmery shade.
Third is medium brown shimmery shade.
Fourth is very light peachy pink shimmery shade.
Fifth is duo chrome shade with beige base and yellow golden reflects.
Rose Gold from bottom to top shades
First shade is dark brown shimmery shade.
Second one is dark copper shimmery shade.
Third is medium bronze gold shimmery shade.
Fourth is warm rosy pink shade.
Fifth is duo chrome white gold shade similar to Radiant.
If blended Radiant is light bronze shade which gives beautiful bronze gold sheen once applied. While after blending Rose Gold is copper shade which is similar but lighter to this palette's second shade from bottom.
Using as highlighter Radiant can give you more light gold shimmery sheen which can be true to its name Radiant. It will look good on all skin tones and the finish is more natural. While Rose Gold have dark bronze and copper shade can be used as bronzer and is more suitable for dark skin tones as highlighter. However both palettes can equally be used as eye shadows and you can find some similar shades present in famous neutral eyeshadow palettes like UD Naked, Lorac Unzipped or Milani abstract.
Overall these palettes with their beautiful shimmery shades are worth trying with obvious choice of Radiant for light o medium skin as highlighter and Rose Gold for darker skin tones or as bronzer. With their nice texture and long lasting factor these can be good choice comparing to high end brand.
Makeup Revolution Vivid Shimmer Brick is Priced $4.20 and can be bought form their online store which ship world wide.