The Phanteks XT Pro Ultra wins in 4 out of 8 comparable specs, with 2 ties. Its biggest advantage is Included Fans (100% better).
O11 Vision wins in 2 specs (2.5" Bays: 33% better).
Recommendation
Choose XT Pro Ultra if you want the best overall performance — especially included fans.
Choose O11 Vision if 2.5" bays matters more to you.
AI Versus Verdict
The Phanteks XT Pro Ultra is the objective winner of this comparison, securing more category wins across the evaluated specifications. Its most significant advantage over the Lian Li O11 Vision is the inclusion of fans, which represents a 100% improvement in that specific area. While the Lian Li O11 Vision offers a 33% advantage in 2.5" drive bay capacity, the Phanteks XT Pro Ultra provides a more comprehensive set of features based on the total spec-win count.
Users who prioritize out-of-the-box cooling performance should choose the Phanteks XT Pro Ultra for its superior fan configuration. Conversely, the Lian Li O11 Vision is the better selection for builders who require additional storage mounting options for 2.5" drives. Selecting between these two cases depends entirely on whether your primary build requirement is maximizing internal fan support or increasing the total number of available drive bays for your system.
Generated by Gemini from the objective spec comparison above. AI advice is a summary, not a benchmark — always verify critical purchases.
