The 24-bit/96kHz release (and subsequent hi-res iterations) offers a significant upgrade over the standard CD.

Vitalogy was always an ugly masterpiece. It was meant to feel sick, claustrophobic, and raw. The 2013 24/96 FLAC doesn't clean that up—it frames it. It turns the chaos from a wall of noise into a three-dimensional attack.

But here’s the revelation: the 2013 24-bit/96kHz FLAC remaster (widely circulated among collectors as the “hot” vinyl-rip or high-res digital transfer) doesn’t clean that grime away. It it.

of how the hi-res version differs from the original 1994 CD for specific songs?

: High-res versions often feature the essential 20th-anniversary bonus cuts, including the stripped-down guitar/organ mix of "Better Man" and the raw alternate take of "Corduroy" .