
William-Scott Hathaway |

These aren't archetypes.
True, but they are Alternate Classes. A Samurai is an Alternate Class to a Cavalier and is therefore technically a Cavalier. I have proceeded to assume that as they have specifically been called Alternate Classes that they do qualify for things that their base components qualify for, in this case, feats that require Fighter levels. I will continue to assume this until there is an official ruling on the matter.

AndIMustMask |

as far as i know, yes. there are already alternate classes to serve as a precedent--the ninja, samurai, and antipaladin.
they are the base class (which is why you cant multiclass to the base class, like ninja taking rogue levels, or in this case, a brawler taking fighter levels). they're just dressed up funny.
using the same logic, they might be available to use base class archetypes, if they've got all the abilities to replace with the archetype (such as a ninja taking the scout archetype). though I've asked in a separate topic for clarification on the archetype thing.

Ilorin Lorati |

I know the playtest document calls them "alternate classes," but I don't think the design team has made a decision about whether or not they count as their component classes for the purpose of qualifying for class-specific feats.
It's a good question, though.
Yeah, this is important to know as it affects everything from prerequisites to archetypes that already exist.
Personally, I'm with Malwing and think that having them count for prerequisites would be awesome. Particularly, giving Investigator access to the rogue archetypes that replace Trapfinding and Trap Sense would be really cool.