Let's just not used names for combos... It's so confusing.
Where do you find out what the moves are called and where do you find all the different variations, like I can find a Twisted Sonic but what is a Twisted Sonic 23-12?
Tricks follow a naming convention. <modifier> <spin type> <normal/reverse> <start position> <end position>
For example: Inverse Sonic Reverse 12-23
So the last two numbers state the start position and end position. The thumb is called 'T' and each finger is labelled 1-4, with 1 being the index. So Twisted Sonic 23-12 starts inbetween ring and middle fingers and finishes between index and middle. The start and end positions are usually omitted if the trick finishes in the 'standard' position. A Twisted Sonic would always be assumed to be a Twisted Sonic 23-12 if no start or end position is stated.
Btw, Twisted Sonic is technically a combo (Charge > Pass > Charge) but is basically treated by the same conventions that tricks are (for some reason).