Between the Titan 18 HX AI and Galaxy Book4 Ultra, the Titan 18 HX AI comes out ahead in storage / ram, while the Galaxy Book4 Ultra wins on claimed battery life / weight. Overall, the Titan 18 HX AI scores 91.2 and the Galaxy Book4 Ultra scores 70.1 on our Mars Score.
Which should you buy?
The Titan 18 HX AI is the clear pick on raw spec strength, leading by 21.1 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the Titan 18 HX AI if you push the hardware — gaming, on-device AI, heavy multitasking — and the extra compute headroom is worth the trade-offs. The biggest gaps in its favor are storage, ram, cpu cores, among others.
Pick the Galaxy Book4 Ultra if your top frustration with your current device is running out of charge before the day ends — endurance is the lead spec here. Its strongest claims are claimed battery life, weight.
Both ship with comparable refresh rate, thunderbolt ports, backlit keyboard, so those specs do not separate the two — focus on the differences below.
Bottom line: the Titan 18 HX AI is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why MSI - Titan 18 HX AI wins
- ▲Storage — 300.00% more. 4096 GB vs 1024 GB.
- ▲RAM — 100.00% more. 64 GB vs 32 GB.
- ▲CPU cores — 50.00% more. 24 vs 16.
- ▲Battery — 31.57% more. 99.99 Wh vs 76 Wh.
- ▲Screen size — 12.50% more. 18 " vs 16 ".
- ▲Panel type: Mini-LED (vs OLED).
Why Samsung - Galaxy Book4 Ultra wins
- ▲Claimed battery life — 120.00% more. 11 h vs 5 h.
- ▲Weight — 1.74 kg less. 1.86 vs 3.6.
Spec comparison
Design
| Spec | MSI - Titan 18 HX AI | Samsung - Galaxy Book4 Ultra |
|---|---|---|
| Weight | 3.6 kg | 1.86 kglead |
| Thickness | 23.95 mm | 16.5 mmlead |
| Build material | aluminum | aluminum |
| Backlit keyboard | true | true |
| Fingerprint reader | true | true |
Display
| Spec | MSI - Titan 18 HX AI | Samsung - Galaxy Book4 Ultra |
|---|---|---|
| Screen sizeⓘ | 18 "lead | 16 " |
| Refresh rateⓘ | 120 Hz | 120 Hz |
| Panel typeⓘ | Mini-LEDlead | OLED |
Performance
| Spec | MSI - Titan 18 HX AI | Samsung - Galaxy Book4 Ultra |
|---|---|---|
| CPU | Intel Core Ultra 9 285HX | Intel Core Ultra 9 185H |
| CPU cores | 24lead | 16 |
| GPUⓘ | NVIDIA RTX 5090 Laptop | NVIDIA RTX 4070 Laptop |
| RAMⓘ | 64 GBlead | 32 GB |
| Storageⓘ | 4096 GBlead | 1024 GB |
| Storage typeⓘ | SSD | SSD |
Battery & Ports
| Spec | MSI - Titan 18 HX AI | Samsung - Galaxy Book4 Ultra |
|---|---|---|
| Batteryⓘ | 99.99 Whlead | 76 Wh |
| Claimed battery life | 5 h | 11 hlead |
| USB-C ports | 2lead | 1 |
| Thunderbolt portsⓘ | 2 | 2 |
| HDMI | true | true |
Frequently asked
Which has better battery life, Titan 18 HX AI or Galaxy Book4 Ultra?+
Galaxy Book4 Ultra claims up to 11 hours — 5h vs 11h.
Which is lighter, Titan 18 HX AI or Galaxy Book4 Ultra?+
Galaxy Book4 Ultra is lighter at 1.86 kg vs 3.6 kg.
Which has more RAM, Titan 18 HX AI or Galaxy Book4 Ultra?+
Titan 18 HX AI offers 64GB of RAM.
Which has an OLED display, Titan 18 HX AI or Galaxy Book4 Ultra?+
Galaxy Book4 Ultra has an OLED display; Titan 18 HX AI uses Mini-LED.
Spec-level deep dives
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