I'm not sure why Kemba vs Kyrie is even being debated. I haven't read all the pages of posts, but I figured I'd offer my input.
Kemba is a solid young PG and we are blessed to have him. Anyone who says otherwise is lost. However if you think that Kemba is better or even on par with Kyrie then I just don't know what to tell you. Kyrie is the better finisher, has the better mid range shot, better 3pt shot, better handles (although it's somewhat close), is bigger and just the better pure scorer. Kemba is about equal with him when it comes to passing ability in my opinion and has better intangibles. Kemba also has a tendency to stay healthy while Kyrie get injured a decent amount (except last season where he was relatively healthy).
I'm just not sure what there is to debate. Kyrie had his worst year as a pro probably and it's still better than Kemba's best year as a pro (2012-2013). Kyrie shot 43% this season (his worst), while Kemba shot 39% this season (his best was 42% in 2012-2013). Their assists are a wash, but both have plenty of room to improve. Kyrie has never had much talent around him, but neither has Kemba, other than Big Al, and honestly Big Al doesn't get you assists. Kyrie is a bigger and better version of Kemba. Their shot selection is very similar but Kyrie is more efficient everywhere on the court.
Kemba is one of my 5 favorite players in the NBA, but Kyrie is definitely a tick above him right now.