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[Zombies] What are the differences between zombies, such as Romero zombies and Resident Evil zombies?

Everyone understands the difference between a "regular" zombie and a 28 Days zombie. However, I was recently thinking, are there differences in the different "regular" zombies we see?


Specifically, I wanted to look at the differences (if there are any) between Romero zombies, Walking Dead zombies, Max Brooks zombies(book not movie), and Resident Evil zombies.
gpt
**From the desk of Brigadier General Z. Shanix, Acting Officer of US Army Biological/Organic Infection Isolation and Containment Unit, on behalf of Dr. X. Imea, Lead Researcher.**
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Originator Zombies, AKA Romeros:

* Original popular zombies, baseline for most zombie ideas.
* Transfer via bite, up to three days from 'normal' to 'zombie'
 * Removing limb (if applicable) fast enough can stop infection
* Require brain trauma to 'cure'
* Do not 'eat' people for hunger - major psychological need for it.
* Can learn over time, albeit very slowly.
* Unable to run, best pace is walking.
 * Can 'jump' at prey if need be, nearby
 * Unlimited endurance, humans can outwalk but cannot outrun.
* Can survive as head w/out body but body cannot survive w/out head.
* Can have 'hunger' turned off after major surgery.
* 10-12 Years before major necrosis sets in and zombie is near incapacitation

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Walkers/Roamers/Lurkers/Geeks/Biters, AKA Walking Dead Zombies:

* Comparable to Romero zombies, however displays of intelligence have been noted.
 * Lurkers have been recorded to play 'dead' until prey arrives, then attacking
* Overall, less likely to 'learn' than Originators.
* Does **not** require a bite to become a zombie.  Pathogen is exposed to all - if death occurs, then the person will be reanimated.
* Known to convert from death between seconds and eight hours.

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Ghouls, AKA Brooks Zombies:

* Known Pathogen, the Solanum Virus.  Known to exist throughout major human history (records dating to Egyptian times of zombie outbreaks)
 * Disables need for Oxygen for Ghouls.  Brain is changed into organ that negates the need.
* Very similar to Originators.
* General 24 hour time period between bite and Reanimation - including death.  **A Bite from a Ghoul means DEATH**.
* Does not enhance a human in any way other than lack of oxygen - a human is a box of tools, Solanum does not add any new ones.
* Solanum has effects on the sense.
 * Sight minorly degenerated from baseline Human.
 * Hearing unaffected.
 * Smell unaffected, possibly enhanced to a minor degree.
 * Taste, unknown.
 * Touch removed.  Pain completely removed from Ghoul 'mind'
 * Possible additional sense - Ghouls have been known to attack when all sense removed
* Unable to regenerate wounds - a thousand cuts will be a thousand cuts.
* 3-5 Year Span between infection and degeneration to near safe standards.

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T-Virus Infected, AKA Resident Evil Zombies:

* Based on experimental virus, the T-Virus.
 * Produced by Umbrella Corporation
* Brain cells damaged by Virus.
* Can digest meat eaten, however, this requires an overproduced of stomach acid - noted cases of zombies puking acid repeatedly
* Require Decapitation to be stopped.
* Known cases of zombies with greater than average abilities - Hyper Zombies.
 * Can take more damage than average T-Virus Infected
 * Can move faster
* Few cases reported of zombies waiting, pretending to be dead a la Lurkers.
* After dormancy, T-Virus Infected can reanimate again into "Crimson Heads"
 * Aggression, movement speed are sharply raised
 * Claws develop on hands and feet.
* After dormancy, T-Virus Infected can reanimate again into "Lickers"
 * Haunched, four legged creation.
 * Tongue elongated into hunting weapon - akin to prehensile tail.
 * Brain tissue becomes exposed, skin lost.
 * Incredibly agile - jumping ability greater than most mammals.
 * Claws develop on hands and feet.
 * Greater intelligence - noted instance of Lickers hunting in Pack
 * Loss of Sight, compensated for by increased Hearing.
 * Can evolve into further strains.

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Rage Infected, AKA 28 Days Later Zombies:

* Caused by Rage Virus, based on Ebola Virus.
* Not restricted to humans - primates have been infected.
* Transferred through bite, injection, or any contact between infected and uninfected blood.
* 10-20 Second window between infection and Zombiism.
* Not 'standard' zombies, rather, infected by virus that turns them to cannibals
* Noted increase in speed, Strength, stamina, and mobility over time.
* Starvation will cause death, approximately 2-3 months after last 'feeding'
* Noted intelligence, at or around level of Originator Zombies
* Unable to swim
* Focused on killing rather than eating
* **Do not require Decapitation for incapacitation**
* Known to use complex paths to reach uninfected.

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We hope this answers your questions.  Please direct all further inquiries to our office if need be.

*Signed,*

Brigadier General Shanix & Dr. Imea

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Addendum: Several other researchers have pointed out inaccuracies, or expanded upon, this letter below.  Their word is as good as ours, if not better.