The Lian Li O11 Dynamic EVO wins in 4 out of 8 comparable specs, with 1 tie. Its biggest advantage is 2.5" Bays (200% better).
G400A wins in 3 specs (Included Fans: 100% better).
Recommendation
Choose O11 Dynamic EVO if you want the best overall performance — especially 2.5" bays.
Choose G400A if included fans matters more to you.
AI Versus Verdict
The Lian Li O11 Dynamic EVO is the objective winner of this comparison, securing a lead in four out of eight measured specifications. Its most significant advantage is the storage capacity, as it offers 200% more 2.5" bays than the alternative. This superior drive support makes it the more versatile option for users who prioritize extensive internal storage configurations over other hardware considerations.
Choose the Lian Li O11 Dynamic EVO if you require maximum space for 2.5" drives to support your storage needs. Conversely, select the Phanteks G400A if you prioritize out-of-the-box cooling performance, as it provides a 100% advantage in the number of included fans. The Phanteks G400A is the better choice for builders who prefer a pre-configured thermal solution without needing to purchase additional hardware separately.
Generated by Gemini from the objective spec comparison above. AI advice is a summary, not a benchmark — always verify critical purchases.
