Head to head
Logitech G915 X Lightspeed vs Razer BlackWidow V4 75%
Both scored on the same six factors, priced on what you actually pay including delivery, and each claim linked to the source it came from. Prototype data — prices and retailer stock are a fixed demo snapshot from 28 July 2026, not a live feed.
Verdict
The Razer BlackWidow V4 75% wins on both score and price.
Across these 2 keyboards, the Razer BlackWidow V4 75% has both the highest Worth Score (7.5) and the best score per euro at 199,00 €. That is unusual — normally you trade one for the other. Its weak point is synapse must be running for most features to work.
Best overallRazer BlackWidow V4 75% — Highest Worth Score here at 7.5, 0.8 ahead of the Logitech G915 X Lightspeed. Best for gaming on a board that also types well.
Skip this oneLogitech G915 X Lightspeed — Lowest Worth Score here at 6.7, 0.8 lower against the Razer BlackWidow V4 75% and no cheaper. Switches are soldered and the battery is not user-replaceable
Side by side
Add a third product →The value of a comparison is the differences.
| What matters | Logitech G915 X LightspeedLogitechMedium confidence | Razer BlackWidow V4 75%RazerMedium confidence |
|---|---|---|
| Worth Score | 6.7 | 7.5 (best in this comparison) |
| Best price | 239,00 € | 199,00 € (best in this comparison) |
| Price fairness | 5.0 | 6.6 (best in this comparison) |
| Build quality | 8.4 (best in this comparison) | 8.2 |
| Performance | 8.0 | 8.4 (best in this comparison) |
| Longevity | 7.2 | 7.6 (best in this comparison) |
| Repairability | 2.2 | 7.4 (best in this comparison) |
| Support & warranty | 8.0 (best in this comparison) | 6.0 |
| Switches | GL low-profile tactile/linear/clicky, soldered | Razer Orange tactile, hot-swap |
| Layout | Full size or TKL | 75%, 82 keys with rotary knob |
| Connection | Lightspeed 2.4 GHz, Bluetooth or USB-C | USB-C, detachable |
| Hot-swappable | No | Yes |
| Build | Brushed aluminium top, 22 mm tall | Aluminium top plate, gasket mounted |
| Best for | A thin keyboard that is still mechanical · Wireless with no perceptible latency · Desks where height matters | Gaming on a board that also types well · Hot-swap without building from parts · A rotary knob and full RGB |
| Avoid if | You want to open it · You are comparing on price | You will not install Synapse · You want wireless |
| Main drawback | Switches are soldered and the battery is not user-replaceable | Synapse must be running for most features to work |
1 identical row hidden. They are the same for every product here, so they cannot help you choose.
What each score is based on
3 published sources between themLogitech G915 X Lightspeed
Razer BlackWidow V4 75%
Confidence is computed from those lists, not asserted: Logitech G915 X Lightspeed is medium on 2, Razer BlackWidow V4 75% is medium on 1. A factor with nothing behind it says so on the product page rather than borrowing a citation that does not speak to it.
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Prototype. Prototype data — prices and retailer stock are a fixed demo snapshot from 28 July 2026, not a live feed. Prices are the cheapest delivered price we recorded — 239,00 € and 199,00 € — not a live quote. How we score products.