How would you call these 2 loose ball situations?

[APG]

Situation 1:

Assuming B1 is making a play for the ball, and assuming one player isn't in a more advantageous position to play the ball than the other, I would have nothing (I'm assuming B1 went down to slide as well in this situation).
*Edit*
I actually read the play the other way around...still would have to see how the situation played out but strictly going from your scenario, it would be a foul on the sliding player.

Situation 2:

From the sounds of it, B1 is in a more advantageous position than A1 to get to the ball...thus the onus will be on A1. I'd most likely have a foul on A1

That's if I'm envisioning these plays correctly. Did you see these type of plays occur in a game?