I didn't see The Shattered Fortress shows at all, but I have watched everything I could on YouTube. I saw the Feb. 26, 2000 show of SFAM in New York at Roseland. I also saw DT this year in San Francisco.
TSF has an energy behind it that the most recent DT show in SF lacked. It reminded me more of the original performance of the record in NYC 20 years ago. To me, it is clear as day.
All of that said, however, with all the production DT did in 2019 on the current tour and the last tour leg, it was much more of a theatrical event. It was special, and it was awesome with some incredible moments that the animations and production really drove home. The original show I saw in 1999 was a GA venue, with mosh pits and just that whole rush of energy you feel from a crowd. You can't replicate that using seated venues. It's almost impossible.
And I believe back in 1999, and TSF, they were not using a click, whereas they do now (2019). That makes a big difference at times, at least to my ears.