Well I'll be honest. This question has been bugging me for quite some time. Both of the Ichigo's are extremely strong. But I was just curious, in a comparison who would prove to be stronger of the true.
Arguements for Ichigo 1:- 1.His spiritual pressure exceeded Aizen's. 2.He could 1 Hit KO anybody else at that time. 3.He Mugetsu. 4.He defeated Aizen.
Arguements for Ichigo 2:- 1.He is the latest transformation. 2.He will most probably fight the main villain aka Yhwach. 3.Dual Zangetsus look cooler. 4.He now knows about the true origins of Zangetsu.