The MK version of "I'm not your friend, buddy"

Probably a spectre it's someone that doesn't accept the death and "resurrection", but at least understand that is the only way for his vengeance. The wraith accept his death, and agree his new "life" because is totally conscious that what implies.

Spectre-Scorpion- A one track minded dead guy given powers over the Hell fire. His flame will never be extinguished until he gets revenge(on the right people). Or maybe the only way is to realize his existence could become more than just revenge and fight for his former world of Earthrealm instead of being selfish.

Wraith-Noob Saibot- A shadow of his former self. Dead guy with powers over the shadow. Completely accepts his existence and relishes it. Made to serve the forces of evil but kept his own tainted mind and Works for his personal gain. Power Hungry. Wants to Rule.

Sounds about right.

Spectre

Medium Undead (Incorporeal)

Hit Dice:
7d12 (45 hp)

Initiative:
+7

Speed:
40 ft. (8 squares), fly 80 ft. (perfect)

Armor Class:
15 (+3 Dex, +2 deflection), touch 15, flat-footed 13

Base Attack/Grapple:
+3/-

Attack:
Incorporeal touch +6 melee (1d8 plus energy drain)

Full Attack:
Incorporeal touch +6 melee (1d8 plus energy drain)

Space/Reach:
5 ft./5 ft.

Special Attacks:
Energy drain, create spawn

Special Qualities:
Darkvision 60 ft., incorporeal traits, +2 turn resistance, sunlight powerlessness, undead traits, unnatural aura

Saves:
Fort +2, Ref +5, Will +7

Abilities:
Str -, Dex 16, Con -, Int 14, Wis 14, Cha 15

Skills:
Hide +13, Intimidate +12, Knowledge (religion) +12, Listen +14, Search +12, Spot +14, Survival +2 (+4 following tracks)

Feats:
Alertness, Blind-Fight, Improved Initiative

Environment:
Any land and underground

Organization:
Solitary, gang (2-4), or swarm (6-11)

Challenge Rating:
7

Treasure:
None

Alignment:
Always lawful evil

Advancement:
8-14 HD (Medium)

Level Adjustment:
-


A spectre looks much as it did in life and can be easily recognized by those who knew the individual or have seen the individual's face in a painting or a drawing. In many cases, the evidence of a violent death is visible on its body. A spectre is roughly human-sized and is weightless.

Combat
monsterinfo

Spectre - a resurrected soul
Wraith - a soul that has become completely corrupted by the evil of the Netherealm, with no trace of humanity left, THEN resurrected

Also I would like to point out that in Noob leaked bio he is called a "Revenant"