Warne was unquestionably better in the 2005 Ashes than in any series he participated in during 1993.
Warne had a bowling average below 20 in the 2005 and took 40 wickets. He had a strike-rate of below 38 balls per wicket. These figures rank up there with even the most skewered... only Warne's figures aren't skewered. You can go back to SF Barnes' figures. An average of 16, better than Warne's... and a slightly worse strike-rate of 41.
If anything, the fact that he had to carry the Aussie team stopped people from realising that he was actually having one of the best series ever.
In 1993 England were shocked by Shane Warne. After the Gatting Ball and another one that knocked over Robyn Smith, England went into uber defensive mode. Warne would bowl 40 overs and go for only 70 runs... but he wouldn't get wickets. It was a total shut-down on scoring runs off him. They were only successful against him in one match. Now granted, Warne captured the people's imagination in that series with his bamboozling. But his strike-rate was in the 70s - almost twice as much as his 2005 series. And his average was poor.
Warne might have a series from 1993-1997 where he did as good as he did in the Ashes. I always felt that period was the best peak in bowling cricket history before his finger surgery. But I can't think of one series where he would have done that well.
Maybe the 1994 Ashes in Australia? I don't know. I honestly think I saw one of the best bowling displays ever in the 2004 Ashes. I believe if you combine the economy of Lee, Kasprowitz and Tait... you might find they went at over 4 runs an over.