Price (USD)
G Pen Pro edgeFirefly 2+
$250
G Pen Pro
$90
G Pen Pro is typically around $160 lower.
Vaporizer Comparison
Firefly 2+ vs G Pen Pro
Side-by-side specs, pricing context, and clear decision guidance.
Firefly 2+
Firefly Vapor $250
VS
G Pen Pro
Grenco Science $90
Editorial Summary
Firefly 2+ and G Pen Pro are both portable / convection vaporizers, but they target different priorities. G Pen Pro is usually the lower-cost pick at $90, around $160 below Firefly 2+. Firefly 2+ has the quicker listed heat-up profile, which can matter for shorter sessions.
Specs Compared
21
Different Specs
19
Shared Specs
2
Overall Overlap
10%
Shared Traits
Portable Convection Electronic
Head-to-Head Highlights
A quick snapshot of the specs people usually care about first.
Heat-Up Time
Firefly 2+ edgeFirefly 2+
~3 seconds
G Pen Pro
~30 seconds
Firefly 2+ has the quicker listed heat-up profile.
Heating Style
Close callFirefly 2+
Convection
G Pen Pro
Convection
Both devices use a similar heating approach.
Key Differences at a Glance
Top specs where these two devices diverge.
Price (USD)
Firefly 2+
$250
G Pen Pro
$90
Heat Up Time
Firefly 2+
~3 seconds
G Pen Pro
~30 seconds
Temperature Range
Firefly 2+
93°C - 260°C
G Pen Pro
190°C - 220°C (375°F - 428°F)
Chamber Capacity
Firefly 2+
~0.15g
G Pen Pro
~0.25 grams
Battery Type
Firefly 2+
Removable (proprietary)
G Pen Pro
Internal
Battery Capacity
Firefly 2+
770mAh
G Pen Pro
2200mAh
Charging
Firefly 2+
Proprietary Dock
G Pen Pro
Micro-USB
Charge Time
Firefly 2+
~45 minutes
G Pen Pro
<3 hours
Power Adjustment
Firefly 2+
Digital (precise)
G Pen Pro
Modular - 3 Stages
Chamber Material
Firefly 2+
Glass
G Pen Pro
Ceramic
Choose Firefly 2+ if...
- You care about faster heat-up time for quicker sessions.
- Your usage leans toward premium and battery swap sessions.
- You prefer Firefly 2+'s overall feature mix and form factor.
Choose G Pen Pro if...
- You want the lower listed entry price ($90 vs $250).
- Your usage leans toward budget sessions.
- You prefer G Pen Pro's overall feature mix and form factor.
Spec Comparison Table
Direct comparison of every spec from each device profile.
19 differ 2 shared
| Specification | Firefly 2+ | G Pen Pro |
|---|---|---|
| Price (USD) | $250 | $90 |
| Device Type | Portable | Portable |
| Heating Type | Convection | Convection |
| Heat Up Time | ~3 seconds | ~30 seconds |
| Temperature Range | 93°C - 260°C | 190°C - 220°C (375°F - 428°F) |
| Chamber Capacity | ~0.15g | ~0.25 grams |
| Battery Type | Removable (proprietary) | Internal |
| Battery Capacity | 770mAh | 2200mAh |
| Battery Life | <90 minutes | — |
| Charging | Proprietary Dock | Micro-USB |
| Charge Time | ~45 minutes | <3 hours |
| Pass-Through Charging | No | — |
| Dimensions | 129x36x24mm | — |
| Weight | ~140g | — |
| Power Adjustment | Digital (precise) | Modular - 3 Stages |
| Chamber Material | Glass | Ceramic |
| Brand | Firefly Vapor | Grenco Science |
| Chamber Type | Ceramic | — |
| Release Date | 2019 | 2017 |
| Session Style | On-Demand | Session |
| Warranty | 2 years | 1 year |
Comparison FAQs
What is the biggest difference between the Firefly 2+ and the G Pen Pro?
The biggest practical difference is price tier: the G Pen Pro sits at $90 while the Firefly 2+ is $250, a gap of about $160 that puts them in different buying brackets.
Which is cheaper, the Firefly 2+ or the G Pen Pro?
G Pen Pro is the cheaper option at $90 compared with $250 for the Firefly 2+, about $160 less. Live retailer pricing can shift, so confirm before buying.
Which heats up faster, the Firefly 2+ or the G Pen Pro?
Firefly 2+ reaches session-ready temperature in ~3 seconds, while the G Pen Pro takes ~30 seconds. That's roughly 27 seconds quicker on the Firefly 2+, which is useful if you want shorter, on-demand sessions.
Does the Firefly 2+ or the G Pen Pro hold more flower?
G Pen Pro has the larger chamber at ~0.25 grams, versus ~0.15g on the Firefly 2+. A bigger bowl means fewer reloads on long sessions; a smaller one suits microdosing and quicker bowls.
Can I swap the batteries on the Firefly 2+ or the G Pen Pro?
Firefly 2+ uses removable (proprietary), so you can carry spares for back-to-back days. The G Pen Pro has a built-in battery you can't swap on the go.
Can I set custom temperatures on the Firefly 2+ or the G Pen Pro?
Firefly 2+ controls heat with digital (precise), while the G Pen Pro uses modular - 3 stages. Firefly 2+ gives you finer per-degree control.
Which charges faster, the Firefly 2+ or the G Pen Pro?
Firefly 2+ fully charges in ~45 minutes, ahead of <3 hours on the G Pen Pro.
Need a different matchup?
Jump into the comparison hub to pick any two devices and open a canonical side-by-side page.