Geek Bar and Lost Mary are the two most popular disposable vape brands in the US — and on paper, they're almost impossible to separate. Both are manufactured in Shenzhen, both use dual mesh coils with dual power modes, both hold 16ml of 5% nicotine salt e-liquid, and both deliver approximately 15,000 puffs in their base models. The specs overlap so precisely that the choice comes down to three things: screen philosophy, airflow design, and flavor personality. After testing the Pulse 15K and Pulse X 25K against the MT15000 Turbo and MO20000 Pro side by side, I can map exactly where each brand wins — and where neither has a meaningful edge.
Head-to-Head Specs: Every Model Compared
| Spec | Geek Bar Pulse 15K | Lost Mary MT15000 | Geek Bar Pulse X 25K | Lost Mary MO20000 Pro |
|---|---|---|---|---|
| Puffs (Reg/Boost) | 15K / 7.5K | 15K / 7.5K | 25K / 15K | 20K / ~10K |
| Wattage | 10W / 20W | 11W / 22W | 12W / 25W | Button-switch modes |
| E-Liquid | 16ml | 16ml | 18ml | 18ml |
| Battery | 650mAh | 600mAh | 820mAh | 800mAh |
| Screen | Full LED panel | Compact HD screen | 3D Curved (wraps sides) | Color LCD |
| Mode Switch | Physical slider | Slider switch | Physical slider | Button press |
| Airflow | Mode-linked | Independent | Mode-linked | Independent |
| Physical OFF Switch | ✅ | ❌ | ✅ | ❌ |
| AI Flavor Tuning | ❌ | ❌ | ✅ | ❌ |
| Special Design Feature | Cosmic animations | Thermal color-change body | Starfield 3D display | Marble design |
| Flavor Count | 54+ | 30+ | 46+ | 30+ |
| Street Price | $15-20 | $14-18 | $16-23 | $16-20 |
Where Geek Bar Wins
Screen and visual experience. This is Geek Bar's most obvious advantage. The Pulse's full LED panel and the Pulse X's 3D curved screen are dramatically larger and more visually engaging than Lost Mary's compact displays. If you view your vape as a tech accessory with presence, Geek Bar is in a different league. The trade-off: bigger screens drain more battery and aren't dimmable.
Flavor variety. Geek Bar offers 54+ flavors on the Pulse and 46+ on the Pulse X, spanning 8-9 themed editions (Standard, Zodiac, Frozen, Sour, Mintz, Thermal, Platinum, Slush, Jam). Lost Mary offers approximately 30+ flavors per model. If you want maximum flavor selection — especially niche editions like Slush or Jam — Geek Bar has significantly more options.
Physical OFF switch. Both the Pulse and Pulse X have a three-position slider with a dedicated "Close" position that mechanically disconnects the device. Lost Mary devices have no equivalent — you can't physically lock them off. For pocket safety, this is a meaningful advantage.
AI flavor tuning (Pulse X only). The Pulse X's VPU-calibrated power curves adjust output per flavor profile — a feature no Lost Mary device offers. The improvement is subtle but measurable on complex multi-layer profiles. Details in our Pulse X review.
Where Lost Mary Wins
Independent airflow control. This is Lost Mary's biggest technical advantage. On the MT15000 Turbo, the airflow switch operates independently from the mode toggle — you can run a tight MTL draw in Turbo Mode or a loose DTL draw in Smooth Mode. Geek Bar's Pulse and Pulse X mechanically link airflow to mode position, giving you no independent control. If airflow customization matters, Lost Mary wins decisively.
Flavor philosophy: smoother, more balanced. Geek Bar flavors are designed to hit bold and intense — heavy on candy sweetness, strong cooling agents, and vibrant top notes. Lost Mary flavors tend toward smoother, more balanced profiles with natural-tasting fruit and less aggressive cooling. Neither approach is objectively better — they serve different preferences. Lost Mary is better for all-day vaping without flavor fatigue; Geek Bar is better for bold, attention-grabbing flavor experiences.
Design subtlety. Lost Mary devices are visually elegant — marble finishes, thermal color-changing bodies, ergonomic shapes designed to feel premium without being flashy. Geek Bar leans hard into tech-forward aesthetics with glowing screens and space-themed animations. If you prefer a discrete vape that doesn't draw attention, Lost Mary is the quieter choice.
Slightly lower price at 15K tier. The MT15000 Turbo typically costs $1-3 less than the Pulse 15K online. At the 20K-25K tier, pricing is comparable.
Where Neither Has a Clear Edge
Core performance. At the 15K tier, the Pulse (10W/20W) and MT15000 Turbo (11W/22W) are within 1-2 watts of each other — a difference that falls within normal usage variation. Both use dual mesh coils, dual cores, 16ml e-liquid, and USB-C charging. Real-world puff counts are approximately 80% of claimed for both brands.
Nicotine delivery. Both use 5% (50mg/ml) nicotine salt formulations with smooth delivery. Both offer zero-nicotine (0%) variants. The throat hit is marginally stronger on Lost Mary due to the extra 1-2W of wattage, but the difference is negligible for most users.
Build quality. Both brands use sealed construction with integrated lithium-ion batteries and USB-C charging. Neither is significantly more durable than the other based on our testing.
The Decision Framework
The biggest, most impressive screen on any disposable. Maximum flavor variety (54+ options). A physical OFF switch for pocket safety. AI-tuned flavor delivery (Pulse X). Bold, intense, candy-forward flavor profiles. The Pulse X's 25K puff count (Lost Mary tops at 20K in the Pro).
Independent airflow control (separate from mode). Smoother, more balanced flavor profiles. A more discrete, elegant device design. Thermal color-changing body (MT15000). Slightly lower pricing at the 15K tier. Natural-tasting fruit flavors for all-day use.