He is a significantly better shooter. He is a better ball handler. He is more efficient than Eric. While its not saying much, he is healthier than Eric. He can take over games on the biggest stage, which Eric has never done. He naturally plays faster than Eric. Cleveland plays more of a slow down game for LeBron's benefit. He can create his own offense in a much bigger way than Eric.
Kyrie has warts, certainly, but my goodness.
He is unquestionably a more gifted talent than Bledsoe. Much better shooter, better ball handler... health stuff, I'd say is a tossup, when you factor in that Bledsoe's missed games last season were because we were tanking. Bledsoe has had his meniscus issues spaced between several fully healthy seasons, while Irving has consistently missed anywhere from 10-30 games a year with injuries. But... that is splitting hairs (or tendons... as it were).
Where I really disagree is the idea that Irving plays at a faster pace. I've seen a lot of media quotes about how the "half court style is because of LeBron", but this is another one of the things the stats do not bear out. Irving plays at a crawl.
I don't recall if this one was linked earlier:
https://fivethirtyeight.com/features/kyrie-irving-wants-to-be-a-no-1-but-hes-better-as-a-sidekick/
I wish Bledsoe played consistently at a faster and occasionally he plays really quick, especially after defensive stops, but Irving isn't the answer if we want to kick to a higher gear. He likes to dribble... and dribble... and dribble some more. He would have felt at home playing in the NBA of about '98-2005.
And, as has been mentioned often. Irving is an absolutely awful defender, who's putrid defense metrics are probably made to look better than they really are by being the beneficiary of some strong defensive teammates.
In summary, Irving is unquestionably more talented than Bledsoe, much more. But I don't know that in a 5 on 5 basketball game where you need to involve teammates on offense and... actually do something on defense, Irving would actually make us any better than Bledsoe does. If he does make us better I think the improvement would be marginal, certainly not enough to even sniff contention and IMO not enough to make the playoffs before his contract is up.
Oh, another note. I also expect that if this trade were to happen we would see Bledsoe's efficiency go up by virtue of playing with LeBron, and Irving's go down by virtue of playing with himself... so to speak.
END OF STORY!
