You can't compare simple win / loss stats as saying which conference is stronger. That's dumb. There are so many things to take into consideration if you through dumbass stats around like that.
You need to compare which teams have had the easier schedule against lower ranked teams, which teams have played more at home, which teams have done the West Coast trip or the Texas triangle, which teams have played more back-to-backs.
Yeah, there is greater parity/disparity in the Eastern Conference, but at the end of the day each conference has 8 teams above .500, and who really gives a damn about your winning % if you miss the playoffs, unless your tanking for the No 1 pick.
If the playoffs started today who would win it all....... the Pistons in a landslide. The Spurs ain't clicking at the moment. The suns without Amare, nope, and the defenceless Mavs, nope.
I can only see one team in the West with the potential to take it all, the Spurs, in the East I see the Heat and Pistons battling it out.
End of the day, we are only 1/3 of the way into the season, a knee injury here or there changes everything. Kobe does a knee, the Lakers are looking at a top 5 lottery pick. Big Ben goes down with spinal problems due to the weight of his hair, the Tons are in trouble, Duncan breaks an ankle, goodbye Spurs.
Oh, the Eastern Conference has the most competetive division in the NBA, have a look at the Central.