Hi everybody and excuse me if this is dumb.

As some may know, I write a monthly research on the Legacy Metagame, in order to establish a breakdown of decks to beat for my blog and forum. What bothers me the most about it is archetype classification. I mean, if you are making a final ranking with decks ordered according to performances, you need to decide wether Supreme Blue is the same deck as Countertop feat. Progenitus or they deserve different categorization. It always ends up being a matter of personal prefference, as it's pretty much impossible to classify all decks that perform in Legacy events in univocal and obvious categories.

However, the Zoo archetype in particular is giving me a lot of headaches. A year or so ago I considered (and I think most of us did) there were two clearly different archetypes: Goyf Sligh and Zoo. Zoo ran lots of creatures and things like Sylvan Library and often splashed black for Dark Confidant, while Goyf Sligh (frecuently called Tarmoburn in spanish boards) ran fewer creatures paired with lots of burn. You all remeber Goyf Sligh, don't you? It was one of the most popular archetypes back in 2008.

After Shards of Alara and Brian Six performance in GP Chicago, Wild Nacatl became a Legacy staple and Goyf Sligh-esque decks started splashing white for it. Through the first half of 2009 these Goyf Sligh decks splashing white became a succesfull archetype and started being called Naya Burn from non-Legacy media. That really pissed me off, as if RGW Sligh-esque decks were Type 2 Naya Burn ports.

Whatever, right after Qasali Pridemage came out, it became obvious that it was going to kick ass in Legacy Zoo. Then, Alix Hatfiled made a list and everybody started playing and performing with similar stuff and now Zoo is one of the decks to beat of the format. We're ok so far.

The problem arrives when I need to decide if this, this, this, this and this can all be considered the same archetype.

Naya Burn decks (again, I hate using that name, but it's a necessary evil) have usually being classified as R/G in deckcheck. For example, take this list as a recent example. But now, with all that Legacy hype we're living, people started calling that very same decks Zoo or Naya Zoo. For reference you have the finalist deck of the German Magic 1 event.

So:
- Is that particular deck Zoo or another archetype?
- Is it a different archetype from Goyf Sligh decks, that deck that was pretty much the same just replacing Nacatl for any other creature?
- If it isn't, is it the same that a Zoo deck running Sylvan Library, Jitte and 3cc beaters?
- Anything running Wild Nacatl is now Zoo?

To sum up:
- Is there a single RGW archetype (Zoo)?