Price (USD)
G Pen Roam edgeFirefly 2+
$250
G Pen Roam
$200
G Pen Roam is typically around $50 lower.
Vaporizer Comparison
Firefly 2+ vs G Pen Roam
Side-by-side specs, pricing context, and clear decision guidance.
Firefly 2+
Firefly Vapor $250
VS
G Pen Roam
Grenco Science $200
Editorial Summary
Firefly 2+ and G Pen Roam are both portable / electronic vaporizers, but they target different priorities. G Pen Roam is usually the lower-cost pick at $200, around $50 below Firefly 2+. Heat-up speed is broadly similar between the two.
Specs Compared
25
Different Specs
24
Shared Specs
1
Overall Overlap
4%
Shared Traits
Portable Electronic
Head-to-Head Highlights
A quick snapshot of the specs people usually care about first.
Heat-Up Time
Close callFirefly 2+
~3 seconds
G Pen Roam
~5 seconds
Both devices are in a similar heat-up range.
Weight
Firefly 2+ edgeFirefly 2+
~140g
G Pen Roam
~317g
Firefly 2+ is the lighter listed unit.
Heating Style
Close callFirefly 2+
Convection
G Pen Roam
Conduction
Heating style differs, which can impact flavor and extraction behavior.
Key Differences at a Glance
Top specs where these two devices diverge.
Price (USD)
Firefly 2+
$250
G Pen Roam
$200
Heating Type
Firefly 2+
Convection
G Pen Roam
Conduction
Heat Up Time
Firefly 2+
~3 seconds
G Pen Roam
~5 seconds
Temperature Range
Firefly 2+
93°C - 260°C
G Pen Roam
204°C - 427°C (400°F - 800°F)
Battery Type
Firefly 2+
Removable (proprietary)
G Pen Roam
Internal
Battery Capacity
Firefly 2+
770mAh
G Pen Roam
1300mAh
Battery Life
Firefly 2+
<90 minutes
G Pen Roam
15-20 sessions
Charging
Firefly 2+
Proprietary Dock
G Pen Roam
Micro-USB
Charge Time
Firefly 2+
~45 minutes
G Pen Roam
~2 hours
Dimensions
Firefly 2+
129x36x24mm
G Pen Roam
178x127x102mm
Choose Firefly 2+ if...
- You want the lighter unit for carrying and travel.
- You prefer a convection heating profile.
- Your usage leans toward premium and battery swap sessions.
Choose G Pen Roam if...
- You want the lower listed entry price ($200 vs $250).
- You prefer a conduction heating profile.
- Your usage leans toward concentrates sessions.
Spec Comparison Table
Direct comparison of every spec from each device profile.
24 differ 1 shared
| Specification | Firefly 2+ | G Pen Roam |
|---|---|---|
| Price (USD) | $250 | $200 |
| Device Type | Portable | Portable |
| Heating Type | Convection | Conduction |
| Heat Up Time | ~3 seconds | ~5 seconds |
| Temperature Range | 93°C - 260°C | 204°C - 427°C (400°F - 800°F) |
| Chamber Capacity | ~0.15g | — |
| Battery Type | Removable (proprietary) | Internal |
| Battery Capacity | 770mAh | 1300mAh |
| Battery Life | <90 minutes | 15-20 sessions |
| Charging | Proprietary Dock | Micro-USB |
| Charge Time | ~45 minutes | ~2 hours |
| Pass-Through Charging | No | — |
| Dimensions | 129x36x24mm | 178x127x102mm |
| Weight | ~140g | ~317g |
| Power Adjustment | Digital (precise) | Digital Control |
| Chamber Material | Glass | Quartz |
| Concentrate Support | — | Yes |
| Brand | Firefly Vapor | Grenco Science |
| Adjustable Airflow | — | No |
| Chamber Type | Ceramic | — |
| Display Type | — | LED |
| Haptic Feedback | — | Yes |
| Release Date | 2019 | 2020 |
| Session Style | On-Demand | — |
| Warranty | 2 years | 1 year |
Comparison FAQs
What is the biggest difference between the Firefly 2+ and the G Pen Roam?
The biggest practical difference is heating approach: Firefly 2+ runs convection while G Pen Roam runs conduction. That changes flavor delivery, vapor density, and how the device responds to slow versus fast draws.
Which is cheaper, the Firefly 2+ or the G Pen Roam?
G Pen Roam is the cheaper option at $200 compared with $250 for the Firefly 2+, about $50 less. Live retailer pricing can shift, so confirm before buying.
What's the difference in heating between the Firefly 2+ and the G Pen Roam?
Firefly 2+ uses convection heating, while the G Pen Roam uses conduction. Heating style influences flavor profile, vapor density, and how forgiving the device is to draw technique.
Which is lighter, the Firefly 2+ or the G Pen Roam?
Firefly 2+ is the lighter unit at ~140g, around 177g less than the G Pen Roam at ~317g. The lighter device is easier to carry and pocket day-to-day.
Can I swap the batteries on the Firefly 2+ or the G Pen Roam?
Firefly 2+ uses removable (proprietary), so you can carry spares for back-to-back days. The G Pen Roam has a built-in battery you can't swap on the go.
Which heats up faster, the Firefly 2+ or the G Pen Roam?
Heat-up times are very close: ~3 seconds on the Firefly 2+ and ~5 seconds on the G Pen Roam. The real-world difference will be hard to notice mid-session.
Which charges faster, the Firefly 2+ or the G Pen Roam?
Firefly 2+ fully charges in ~45 minutes, ahead of ~2 hours on the G Pen Roam.
Need a different matchup?
Jump into the comparison hub to pick any two devices and open a canonical side-by-side page.