I'll tell you that or I can tell you that

Po crashes out of the door and tumbles down the steps.
The Five watch him fall.

VIPER : He’s not gonna quit, is he?
MANTIS: He’s not gonna quit bouncin’, [color=red]I’ll tell ya that.

[color=red]I’ll tell you that or [color=red]I can tell you that? What’s the difference?


No difference in this dialogue.