In those examples you put, the 1st and 2nd, are the same thing, just that the one on the A stirng is one octave higher.
The 3rd and 4th examples, are exaclty the same.
by the way, there is no such thing as real tab man...Te only real thing here, is your desperate need for learning basic theory man. You need a lesson or explanation reaaaal bad.
read carefully this great lesson on basic theory by Jazzbo:
http://www.talkbass.com/html/modules...article&sid=31