There are differences in the aircraft.

I have not seen the Ultra-Stick Lite... so can't comment on it.

The Ultra Stick has much larger control surfaces than the Super Stick.

The Ultra stick has the wing control surfaces split for flaps and ailerons. Appx 50-50 split. This allow many different control mixing possibilities. The Super Stick just has full span strip ailerons.

The Ultra Stick is a decent introductory 3-D aircraft that can be adjusted for near trainer like flying... if you limit the control throws drasticly. The lack of dihedral makes it a poor choice for introductory training purposes.

The Super Stick is a bit of a cross between a sport aerobat and a trainer... Its shoulder wing and symetrical airfoil help with aerobatics... but the dihedral and relatively small control surfaces make responses very similar to those of a trainer.