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

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	7000 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 who travel between locations or work full 10-hour days without access to charging during their shift.
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.	Supreme Trimmer Vader has the longest battery in its class at 210 minutes. DLC T-blade maintains zero-gap precision. USB-C charging. 7000 RPM motor handles dense hairlines without slowing.
	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-min battery record in class
✓DLC T-blade zero-gap
✓USB-C charging
✓7000 RPM motor

✗New brand, no long track record
✗Heavier than slim trimmers
✗Price point high for brand

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

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.

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