Price (USD)
G Pen Roam edgeG Pen Roam
$200
PAX 3
$250
G Pen Roam is typically around $50 lower.
Vaporizer Comparison
G Pen Roam vs PAX 3
Side-by-side specs, pricing context, and clear decision guidance.
G Pen Roam
Grenco Science $200
VS
PAX 3
PAX Labs $250
Editorial Summary
G Pen Roam and PAX 3 are both portable / electronic vaporizers, but they target different priorities. G Pen Roam is usually the lower-cost pick at $200, around $50 below PAX 3. G Pen Roam has the quicker listed heat-up profile, which can matter for shorter sessions.
Specs Compared
23
Different Specs
20
Shared Specs
3
Overall Overlap
13%
Shared Traits
Portable Electronic Concentrates
Head-to-Head Highlights
A quick snapshot of the specs people usually care about first.
Heat-Up Time
G Pen Roam edgeG Pen Roam
~5 seconds
PAX 3
<30 seconds
G Pen Roam has the quicker listed heat-up profile.
Weight
PAX 3 edgeG Pen Roam
~317g
PAX 3
~93 grams
PAX 3 is the lighter listed unit.
Heating Style
Close callG Pen Roam
Conduction
PAX 3
Conduction
Both devices use a similar heating approach.
Key Differences at a Glance
Top specs where these two devices diverge.
Price (USD)
G Pen Roam
$200
PAX 3
$250
Heat Up Time
G Pen Roam
~5 seconds
PAX 3
<30 seconds
Temperature Range
G Pen Roam
204°C - 427°C (400°F - 800°F)
PAX 3
182°C - 215°C (260°F - 420°F)
Battery Type
G Pen Roam
Internal
PAX 3
Internal 18650
Battery Capacity
G Pen Roam
1300mAh
PAX 3
3500mAh
Battery Life
G Pen Roam
15-20 sessions
PAX 3
~90 minutes
Charging
G Pen Roam
Micro-USB
PAX 3
Proprietary Dock
Charge Time
G Pen Roam
~2 hours
PAX 3
~90 minutes
Dimensions
G Pen Roam
178x127x102mm
PAX 3
98mm x 31mm x 22mm
Weight
G Pen Roam
~317g
PAX 3
~93 grams
Choose G Pen Roam if...
- You want the lower listed entry price ($200 vs $250).
- You care about faster heat-up time for quicker sessions.
- You prefer G Pen Roam's overall feature mix and form factor.
Choose PAX 3 if...
- You want the lighter unit for carrying and travel.
- Your usage leans toward conduction and discrete sessions.
- You prefer PAX 3's overall feature mix and form factor.
Spec Comparison Table
Direct comparison of every spec from each device profile.
20 differ 3 shared
| Specification | G Pen Roam | PAX 3 |
|---|---|---|
| Price (USD) | $200 | $250 |
| Device Type | Portable | Portable |
| Heating Type | Conduction | Conduction |
| Heat Up Time | ~5 seconds | <30 seconds |
| Temperature Range | 204°C - 427°C (400°F - 800°F) | 182°C - 215°C (260°F - 420°F) |
| Chamber Capacity | — | <0.35 grams |
| Battery Type | Internal | Internal 18650 |
| Battery Capacity | 1300mAh | 3500mAh |
| Battery Life | 15-20 sessions | ~90 minutes |
| Charging | Micro-USB | Proprietary Dock |
| Charge Time | ~2 hours | ~90 minutes |
| Bluetooth / App | — | Yes |
| Dimensions | 178x127x102mm | 98mm x 31mm x 22mm |
| Weight | ~317g | ~93 grams |
| Power Adjustment | Digital Control | Modular - 4 stages |
| Chamber Material | Quartz | Stainless Steel |
| Concentrate Support | Yes | Yes |
| Brand | Grenco Science | PAX Labs |
| Adjustable Airflow | No | — |
| Display Type | LED | — |
| Haptic Feedback | Yes | — |
| Release Date | 2020 | 2016 |
| Warranty | 1 year | 10 years |
Comparison FAQs
What is the biggest difference between the G Pen Roam and the PAX 3?
The biggest practical difference is portability: the PAX 3 is roughly 224g lighter than the G Pen Roam, which adds up over a day of pocket carry.
Which is cheaper, the G Pen Roam or the PAX 3?
G Pen Roam is the cheaper option at $200 compared with $250 for the PAX 3, about $50 less. Live retailer pricing can shift, so confirm before buying.
Which heats up faster, the G Pen Roam or the PAX 3?
G Pen Roam reaches session-ready temperature in ~5 seconds, while the PAX 3 takes <30 seconds. That's roughly 25 seconds quicker on the G Pen Roam, which is useful if you want shorter, on-demand sessions.
Which is lighter, the G Pen Roam or the PAX 3?
PAX 3 is the lighter unit at ~93 grams, around 224g less than the G Pen Roam at ~317g. The lighter device is easier to carry and pocket day-to-day.
Can I set custom temperatures on the G Pen Roam or the PAX 3?
G Pen Roam controls heat with digital control, while the PAX 3 uses modular - 4 stages. G Pen Roam gives you finer per-degree control.
Which charges faster, the G Pen Roam or the PAX 3?
PAX 3 fully charges in ~90 minutes, ahead of ~2 hours on the G Pen Roam.
Which is more discreet, the G Pen Roam or the PAX 3?
PAX 3 is the better pick if low-profile use matters. It's tagged as stealth or pocket-friendly in our database, while the G Pen Roam is more conspicuous in hand and harder to keep out of sight.
Need a different matchup?
Jump into the comparison hub to pick any two devices and open a canonical side-by-side page.