I would say on paper the '87 Celtics were better, and the 2010 Celts were, too. This is the *deepest* championship contender that we've had in a long, long time, but in terms of quality on paper, I'd say the two teams I named were better.
Of course, in the case of those two teams, expectations weren't met, for whatever reason. The '87 team was doomed by injuries, and last year Rasheed and Marquis underperformed compared to what people thought they'd do when we looked at the season on paper.