Gran Mal is a "rocker activated single pivot" or "Faux bar" if you give it the common name - the dropout sits on the swingarm
Devinci is a "true 4-bar" with "horst pivot" - the dropout is not sitting on the swingarm but connected by a pivot
what this mean to you, out on the trail is hard to tell, but they will ride kinda different.
i've owned and spent lots of time riding true 4-bars (Devinci, Big Hit) and "faux bar" (Kona, Banshee) and there does seem to be a big diff. in brake jack, pedalling and plushness between each of these designs, but this can be a result of pivot placement, tube shapes, design details, etc. rather than just the use of a horst pivot, or not
the Kona Stinky / Stab and banshee Scream ride totally different for example, as do the Ollie and the Big Hit
Mythic / Da Kine / Esher Shore / Freeborn