Some points to bring up regarding this argument though I think the two are about as even against each other as it comes:
- Are we talking about one on one against each other or team results against each other. One on one, the players are very evenly matched and if that is your stance then what exactly does the results of the series or who they play with have anything to do with this argument. It doesn't so most of your friend's retort is meaningless.
- Even the most ardent Cavs fans that I know will admit that LeBron plays by one set of rules and the rest of the NBA plays by another. LeBron, one on one against Pierce always gets to play more physical and will always go to the line more because the refs call fouls on him and by him more in his favor than any other player in the league. If your friend can't admit to this then stop the argument right there because you aren't dealing with a person with any objectiveity whatsoever and you will be wasting your breath.
- LeBron doesn't play defense against Pierce better than Pierce plays defense against LeBron. Both players are probably, along with Ron Artest, the only really good "power" 3's in the league. Out of the three players, LeBron is the worst of the three defensively against each other. On the other hand, LeBron is a handful and a half for Pierce but Pierce might just be a handful and three quarters for LeBron because he is such a better outside shooter and better FT shooter.
- LeBron is slowly but surely transforming his game into that of a PF. As he does it is going to become harder and harder for him to handle Pierce as Pierce will simply do what he did last night and out-quck him and leave LeBron holding his jock. It happened on three seperate occasions last night and leBron looked bad. If LeBron decides to get any bigger it won't be long before Mike Brown has someone else guarding Pierce. Maybe not this year but possibly next year and beyond.
Hope that helps and I wonder what your buddy will say to these points.