Is the JRL Onyx 2020T-B Trimmer worth choosing over the Supreme Trimmer Vader ST3778 Cordless Liner 210 Min?

The JRL Onyx 2020T-B Trimmer scores 9.3/10 against 8.5/10 — 0.8 points higher on our editorial scale. Busy barbers who want a long-running dedicated trimmer for lineups, outlines and detail work.

BarberSupplyHub/Compare/JRL Onyx 2020T-B Trimmer vs Supreme Trimmer Vader ST3778 Cordless Liner 210 Min

TRIMMERS · COMPARISON · 2026

JRL ONYX 2020T-B TRIMMER vs SUPREME TRIMMER VADER ST3778 CORDLESS LINER 210 MIN

Q: Which costs more: the JRL Onyx 2020T-B Trimmer or the Supreme Trimmer Vader ST3778 Cordless Liner 210 Min?

JRL Onyx 2020T-B Trimmer is the more expensive of the two. We do not publish live prices — Amazon listings change without notice, so check the current price there before deciding.

Full side-by-side: scores, specs, pros & cons. Our pick: JRL Onyx 2020T-B Trimmer at 9.3/10.

🏆

🏆 OVERALL WINNER

JRL Onyx 2020T-B Trimmer

9.3/10

Check Price on Amazon Read Full Review

🏆 OVERALL WINNER

JRL

Onyx 2020T-B Trimmer

9.3/10Check price

Read full review →

Specs and the Amazon link on the review page

Supreme Trimmer

Vader ST3778 Cordless Liner 210 Min

8.5/10Check price

Read full review →

Specs and the Amazon link on the review page

⚖️ Side-by-Side Comparison

	🏆 OVERALL WINNER JRL Onyx 2020T-B Trimmer	Supreme Trimmer Vader ST3778 Cordless Liner 210 Min
Score	9.3/10	8.5/10
Price	Check price	Check price
Motor	8,200 RPM Smart-Clip	7,000 RPM
Battery	3.5 hr	210 min
Cordless	✓ Yes	✓ Yes
Zero-Gap	✓ Yes	✓ Yes
Best for	Busy barbers who want a long-running dedicated trimmer for lineups, outlines and detail work.	Barbers looking for a cordless detail trimmer with USB-C charging and a visible battery indicator.
Verdict	The JRL Onyx 2020T-B is a dedicated professional trimmer with an 8,200 RPM motor, Smart-Clip power control, an exposed 360-degree EZ-GAP T-blade and up to 3.5 hours of cordless runtime. A charging dock is included for station use.	The Vader ST3778 combines a 7,000 RPM motor, a DLC T-blade with adjustable zero gap, a manufacturer-listed 210-minute runtime and USB-C charging. An LED battery indicator shows battery status.
	Read full review → Specs and the Amazon link on the review page	Read full review → Specs and the Amazon link on the review page

📊 SCORE BREAKDOWN

JRL ONYX 2020T-B TRIMMER

Lineup Precision

9.4

Battery Life

9.8

Motor Power

9.3

Value

8.6

OVERALL SCORE9.3/10

SUPREME TRIMMER VADER ST3778 CORDLESS LINER 210 MIN

Battery Life

9.5

Blade Sharpness

8.5

Charging

8.8

Value

7.8

OVERALL SCORE8.5/10

✓ PROS & ✗ CONS

JRL ONYX 2020T-B TRIMMER

✓8,200 RPM motor with Smart-Clip power control
✓Up to 3.5 hours of cordless runtime
✓Exposed 360-degree EZ-GAP T-blade
✓Charging dock included

✗Dedicated detail trimmer, not a bulk-cutting clipper
✗Exposed blade needs careful alignment and handling
✗Premium tool for barbers who will use its long runtime

SUPREME TRIMMER VADER ST3778 CORDLESS LINER 210 MIN

✓210-minute manufacturer-listed runtime
✓DLC T-blade with adjustable zero gap
✓USB-C charging
✓7,000 RPM motor
✓LED battery indicator

✗The manufacturer does not publish an adjustable-speed specification

COMMONQUESTIONS

Which is better: JRL Onyx 2020T-B Trimmer or Supreme Trimmer Vader ST3778 Cordless Liner 210 Min?

The JRL Onyx 2020T-B Trimmer scores higher at 9.3/10 vs 8.5/10. The JRL Onyx 2020T-B is a dedicated professional trimmer with an 8,200 RPM motor, Smart-Clip power control, an exposed 360-degree EZ-GAP T-blade and up to 3.5 hours of cordless run

What is the price difference between the JRL Onyx 2020T-B Trimmer and Supreme Trimmer Vader ST3778 Cordless Liner 210 Min?

The Supreme Trimmer Vader ST3778 Cordless Liner 210 Min is the cheaper of the two. We do not publish live prices — Amazon listings change without notice, so confirm there.

Which has better battery life: JRL Onyx 2020T-B Trimmer or Supreme Trimmer Vader ST3778 Cordless Liner 210 Min?

The Supreme Trimmer Vader ST3778 Cordless Liner 210 Min has 210 min of battery life vs 3.5 hr for the rival.

Is the JRL Onyx 2020T-B Trimmer worth it over the Supreme Trimmer Vader ST3778 Cordless Liner 210 Min?

At 9.3/10 vs 8.5/10, the JRL Onyx 2020T-B Trimmer leads on performance. Busy barbers who want a long-running dedicated trimmer for lineups, outlines and detail work.

MORE COMPARISONS

More trimmers to compare

JRL Onyx 2020T-B Trimmer vs BaBylissPRO FX+ GoldFX Cord/Cordless Trimmer USB-C Supreme Trimmer Vader ST3778 Cordless Liner 210 Min vs BaBylissPRO FX+ GoldFX Cord/Cordless Trimmer USB-C JRL Onyx 2020T-B Trimmer vs Andis Slimline Pro Li Trimmer Supreme Trimmer Vader ST3778 Cordless Liner 210 Min vs Andis Slimline Pro Li Trimmer JRL Onyx 2020T-B Trimmer vs Andis GTX-EXO Cordless Trimmer 74150 Supreme Trimmer Vader ST3778 Cordless Liner 210 Min vs Andis GTX-EXO Cordless Trimmer 74150 JRL Onyx 2020T-B Trimmer vs Wahl 5-Star Cordless Detailer Li #8171 Supreme Trimmer Vader ST3778 Cordless Liner 210 Min vs Wahl 5-Star Cordless Detailer Li #8171

RELATED GUIDES

Technique guides & buying advice

📖 Perfect Lineup & Edge-Up Guide →📖 How to Line Up a Beard →📖 How to Clean Barber Trimmers →

Full Compare Tool

Compare up to 3 barber tools side by side — all 75 products.

↗ Compare other tools