Simple Q&A D&D 3.5 (by RAW) XXI

[Lonely Tylenol]

Q733

Can a character using the Drow Fighter ACF (DotU) also use the Sneak Attack Fighter and/or Thug ACFs from Unearthed Arcana? Why/why not (just so I understand and don't come here with more questions)?

A733 (partial)
The Drow Fighter ACF can definitely be used in conjunction with the Sneak Attack fighter ACF, as the two trade separate features (the Sneak Attack ACF trades out feats, while the Hit-and-Run ACF trades out heavy armor and shield proficiency). I don't think it can be used in conjunction with the Thug ACF, as they trade the same features (the Thug ACF trades out medium and heavy armor proficiency, as well as shield proficiency, and the Hit-and-Run ACF trades out heavy armor and shield proficiencies).