About seven years ago I began researching a few of the differences between the many versions of Bung Bu that I have seen.
Here is a small comparison on one small section of Bung Bu. Please feel free to add your comments!
WHF Seven Star Praying Mantis
Ascend Mountain, Left Thrust Palm
Ascend Mountain, Right Insert Strike
Vertical Leap, Seal Gathering Strike
Enter Ring, Right Fold Elbow
Enter Ring, Right Crushing Strike
At Back Kick, Double Turn Palms
Horse Stance, Double Seal Hands
CCK Tai Chi Praying Mantis
Ascend Mountain, Left Thrust Palm
Ascend Mountain, Right Insert Strike
Left Lift Knee, Right High Grab/Left Palm Strike
Right Lift Knee, Right Fold Elbow
Right Jade Ring, Right Crushing Strike
Twist Stance, Hang & Spear Hand
Horse Stance, Double Seal Hand
Tai Chi Praying Mantis
Seven Star, Right Nation Palm
Jade Ring, Right Carry Hand into a Punch
Right Twist Stance, Double Hook Grabs
Right Lift Knee, Right Coiling Elbow
Right Jade Ring, Right Crushing Strike
Twist Stance, Left Colliding Claw/Right Palm
Reverse Bow Stance, Double Seal Hands (Smoothly Drag Sheep)
Note that I used the Seven Star terminology through most of the comparisons unless I was aware of terminology used with the style that I described.