All below 900g:
Trek Superfly SL
Have you weighed yours? I had a weigh of a project one one and it was comfortably above 1kg. Looked fantastic though and they ride very well, much better than the FS variant! Guess it was all that bright yellow paint!
For what it’s worth OP, I’ve ridden the following:
Giant XTC (both wheelsizes)
Highball
Stumpjumper
Superfly
Flash 29
Superfly and Stumpjumper were definitely most impressive. The highball was a bit meh, most sluggish but very stable. Really disappointed by the 29er XTC, the 27.5 however was good. The Flash was quite good – would never have one personally because you can’t run less than a 90mm stem, new lefty is better.