okay, then.
7.301 is a Hecht to high bar. this skill was in the elite compulsory in the late 80's and early to mid 90's. the 1/2 turn below it is a Hecht with a 1/2 turn catch high. If you look to the right of this skill you will see the word "Hechtkehre". this is the German for Hecht. i can't remember the name of the girl who did this first, and had it named for her, at the moment.
8.208 is a Hecht dismount from the high bar. these dismounts were first performed by the men in the 50's and 60's and also became a compulsory dismount.
these 2 elements are the same skill. one catches the high bar and one does not and leaves the high bar.
none of them are related to a Tkatchev. i have experience having taught both Hechts and the Shaposh 1/2.
what would you like to know?