I thought the same before I did the math: 2015 − 25 means too early for that 1996 release. But describing Sasha & John Digweed’s Northern Exposure as “progressive house” feels anachronistic, and Sasha at least is known to dislike that label (IIRC, he said something along the lines of “The term was made up by a wanker who didn’t even like the music.”)
No artist likes to have a marketing label attached to their work, even though it helps with branding. So I'm not surprised that Sasha wasn't a fan of the term.
But both him and Digweed did pioneer a unique sound in the 90s. The "Sasha and Digweed sound" doesn't exactly roll off the tongue. Out of the multitude of admittedly not so great labels you could attach to the mixes they put out at the height of their careers, "progressive house/trance" seems to me to be the least offensive.
I'm wondering what alternative you would suggest?