But [Lemieux's] best seasons on a pro-rated, era-adjusted basis are as good as Gretzky's. 1988-89, 1992-93, 1995-96 (at age 30, no less) are phenomenal. It is illogical to compare Gretzky's points totals from the mid-80's straight up to Lemieux's in 1995-96 when scoring had dropped by 20%.
Of course those three seasons (you could add 1987-88, too) are phenomenal for Lemieux, and certainly one by one they're more-or-less on par with some of Gretzky's best seasons. (Aside from 5-on-5 success, in which Mario lags really far behind.)
But two points: 1) team success and 2) consistency/volume, enormously favor Gretzky. With Gretzky, we can pick or choose four or five or six seasons as his best, and he had about 10 in a row that were superhuman. With Lemieux, we're looking at his putting maximum
two elite and full seasons in a row together (1987-88 and 1988-89). That's it -- two. Of course, it's not exactly his fault that he got injured frequently after that, but even in 1989-90 (when he might otherwise have had his third superhuman season in a row) and
prior to his injury, his scoring pace was already noticeably
below that of the season before, he fell to -18, and his team missed the playoffs. (He also fell off that pace further -- in fact, below 30-year-old Gretzky's pace -- in the few games he played in the following year, 1990-91). His scoring was actually slowing down as his team and teammates were getting stronger. This evidence doesn't suggest to me that injuries were what kept Lemieux from consistently putting up numbers to match Gretzky's best.
Likewise, the next time he played two full seasons in a row, from 1995-96 to 1996-97, his pace also fell dramatically in the second season, although in fairness by then he was getting a bit worn down and the lower-scoring NHL was emerging.
I don't think you'll get very far with the era-superiority arguments, when Lemieux was all of 4 years younger than Gretzky and retired before he did. Also, in Lemieux's most productive season (1988-89),
four NHL players scored 150 or more points, something that had never happened prior during Gretzky's peak (in fact,
three had never happened prior). Likewise, in 1992-93, more players scored 100+ points than any season before in history -- two scored 76 goals apiece (one a rookie).
You're probably correct that 1995-96 is the best example of Mario's era-defying statistical scoring, certainly in terms of NHL-average scoring levels. But then again, the Penguins that season scored a whopping 362 goals, 104 more than the League average and about the same amount the Gretzky-Oilers were scoring in 1987 and 1988 (when Gretzky scored at a 184 point-pace). Lemieux would have matched that approximate level if he'd played 10 or 12 more games that season, but the difference here might be that he was +10 to Gretzky's +70. (His team also suffered a collapse against Florida in round three, which seemed to suggest that Lemieux's winning the battle against Scotty Bowman had helped the offensive players' stats but not the team's success.)
But anyway, my point is not about total points scored -- who really cares? There are two players in history who could score 160+ points in a season. Whether one scored 175 or 200, I don't really care. What impresses me more is dominance over peers + consistency, year in and out.