IMO, matching skin tone isnt always the problem and it's not the most important reason to makes the fake looks great (no need to match skin tone perfectly to make the fake perfect)
You can see even in the original picture, skin tone of the HS and the BS dont always match, and that is normal
The most important thing is how you position and blend the HS with the BS (chin line, hair....)
Just go with whatever you think is the best for you
And this is pretty decent for beginner, each of them 4 has different feel, but since you blend the HS pretty well, they're all pretty good well done, Na`Vi is back