Circling back to the original question, I'd like to take a stab at it. Modern comparisons to X-Dream's second album are difficult because most new school Goa trance emphasizes Pleiadian maximalism or Dimension 5's emphasis on whirling cosmic melodies. X-Dream circa 1996 is distinguished by a much cleaner sound palette, sunny melodies (with an occasional hint of something sinister), and those warm, bubbling bass lines that everyone loves so much. I rifled through my collection and didn't find too much along these lines... but two albums jumped out at me: Robert Elster's Still Breathing and Solid Snake's Return to the Source, both released in 2016. Yes, they're both on the progressive psytrance tip, both are slower, but the vibe feels right, and those bass lines are certainly on point.
As for MFG, that feels a little easier, since Radical Distortion exists (check Asinar for a representative example of their imitation MFG sound). Maybe Artifact303's Back to Space would also qualify. My gut sense is that there's a fair amount of darker new school Goa trance roughly in this dimension (but I don't really listen to enough of it to know).
Finally, some potentially overlooked classics at least somewhat related to either X-Dream circa 1996 or MFG circa 1999: Morphem's Out of Focus, Noosphere's Radiated, California Sunshine's Flying Eye Land, Menis' Temporary Insanity, Passenger's For All Man Kind, and The Auranaut's People Want to Be Needed (certain tracks anyway).