Held ball vs. travelling

[oc]

I have been having a hard time understanding when to call a held ball and when to call a travel in the following situation:

A1 goes for a shot and B1 puts a hand(s) on the ball preventing the release of the ball and then A1 comes down with the ball.

Is the deciding factor whether or not B1 put 1 or 2 hands on the ball? As I just reread the case plays in HS FED book I noticed case 4.25.2 says "hands" while 4.43.2 does not. Other than that 4.25.2 a looks the same as 4.43.3 sit a part c to me. Except for one it is a held ball the other is a travel.