what is the difference????
 

HI

I would like to know what is the difference between the end of the wing in these two models in the picture.
the purple model is SUDOKOI and his end of the wing look like all the 3D planes today.
the orange model is SIG FAZER and his end of the wing look like it cut straight.

i read in RCUNIVERSE -3D PLANES furom about people with the GP U-CAN-DEO 3D 60 that had a problem doing knife edge with it, so they cut the end of his main wing so it look like my FAZER.

what is the difference????
 

and the picture

what is the difference????
 

Neither wing tip has a particular advantage over the other. If the question is in regard to is one better in knife edge than the other then I would doubt there is any significant measureable much less noticable difference. I would guess they are thinking that the flat tip in knife edge is goint to produce more lift. It would be trivial.

They are getting a placebo effect.

If you are trying to get knife edge working then reduce weight, use enough rudder to get the sideslip on the fuselage large enough to develope the side force on the fuselage, and increase the side area large enough to develop the side force on the fuselage to hold the airplane up.