The Innokin Coolfire Z80 Nex and SMOK X-Priv Solo are both 80W mod-style devices with a display, but they’re built around different coil ecosystems and design philosophies. This comparison sticks strictly to the specs and notes available for each.
Rather than crowning an overall winner, we’ve compared them category by category, flagging where the evidence simply isn’t there to call a winner fairly.
| Spec | Innokin Coolfire Z80 Nex | SMOK X-Priv Solo |
|---|---|---|
| Image |  |  |
| Max outputPerformance | 80 W | 80 W |
| Battery typeBattery | Replaceable 18650 | Single 18650 |
| DisplayConvenience | Yes | Yes |
| Charging portBattery | USB-C, 5V/2A | Type-C |
| Coil/tank compatibilityCapacity | Full Z Coil series (8 coil options) | SMOK TF-D Sub-Ohm Tank / TFV Mini V2 Tank |
| Vaping stylePerformance | MTL, RDL | Not stated |
| Safety protectionsBuild | safety protections | High output warning, overtime, short-circuit, overheating, low-battery warning |
| Build materialBuild | Zinc alloy, PCTG, leather | Shell |
| Best US priceat time of comparison | $45.77* | $39.49* |
| Read Review & Best Price | Read Review & Best Price |
* Lowest US price we found on 30 Jul 2026. Prices change often — see each review below for live pricing.
Performance
Both devices max out at 80 W, and both include a display, which is why this category is a tie — there’s nothing in the figures to separate them on raw output. The Innokin Coolfire Z80 Nex does note MTL and RDL vaping styles, while no vaping style is stated for the SMOK X-Priv Solo, but this isn’t enough to shift the performance verdict away from a tie.
Battery
The Innokin Coolfire Z80 Nex uses a replaceable 18650 battery, whereas the SMOK X-Priv Solo has a single 18650 — these aren’t directly comparable on the facts given, and no capacity, life, or output-under-load figures are provided for either, so the evidence is too thin to call a winner here.
Convenience
Both products offer a USB-C-style charging port (the Innokin Coolfire Z80 Nex specifying USB-C at 5V/2A, the SMOK X-Priv Solo simply listing Type-C) and both include a display, supporting the tie verdict. The underlying charging speed or convenience difference, if any, isn’t detailed enough to break the tie.
Capacity
No tank or e-liquid capacity figures are given for either device — only coil and tank compatibility (the Innokin’s Z Coil series with eight options versus the SMOK’s TF-D Sub-Ohm Tank / TFV Mini V2 Tank) — so there isn’t enough evidence to determine a capacity winner.
Build
The Innokin Coolfire Z80 Nex lists zinc alloy, PCTG and leather in its construction, while the SMOK X-Priv Solo is described only as having a “shell”, with no material specified. This mismatch in detail means a fair build comparison isn’t possible from the facts alone.
The Innokin Coolfire Z80 Nex suits vapers who want a replaceable 18650 battery, a stated MTL/RDL vaping style, and access to the Z Coil series with eight coil options.
The SMOK X-Priv Solo suits vapers who want a device with a clearly listed range of named safety protections and compatibility with SMOK's TF-D Sub-Ohm or TFV Mini V2 tanks.
The verdict
Neither device comes out as an outright winner here: performance and convenience are tied on the figures provided, while battery, capacity and build lack enough comparable detail to call. What’s clear is that the Innokin Coolfire Z80 Nex offers more transparency on materials and battery replaceability, while the SMOK X-Priv Solo lists a broader set of named safety protections. Choosing between them may come down to coil ecosystem and build preferences rather than any spec-sheet gap.