Which is better for bullet journaling?

The Grabie set. Its 36 colors and 0.7mm line suit headers, color coding and doodles. The Uni-ball R:E is black only, so it is better for the writing itself than for decoration.

Which erases more cleanly?

The Uni-ball R:E. Its friction eraser rubs the heat-sensitive ink away without dust and does not wear down. Grabie's built-in eraser works but is a conventional rubber tip.

The Uni-ball R:E has the sturdier build, with a metal tip and a non-wearing eraser. Grabie pens are plastic and owners report some stop writing after heat exposure, though a 36-pen set spreads the risk.

Is the Grabie set worth stepping up to over a single pen?

Yes if you want color variety for notes, planners or coloring. If you only need one reliable black pen for writing, the Uni-ball R:E is the better single buy.

Can I use either for signatures or legal documents?

No. Uni-ball warns its erasable ink is not for signatures, legal documents or addressing envelopes. Grabie's erasable gel ink carries the same risk of fading or erasure.

Do both handle heat the same way?

Roughly. Uni-ball's ink turns invisible above 140°F and can return below 14°F. Grabie owners report pens that stop writing after heat exposure until frozen.

Grabie Erasable Gel Pens vs Uni-ball R:E Erasable Gel Pen 0.5mm

Buy the Grabie set if you want many colors for notes, journaling and coloring. Buy the Uni-ball R:E if you want one precise black pen for everyday writing and clean erasing. The Grabie wins on color range and value per pen; the Uni-ball wins on tip precision, metal tip build and eraser durability. Grabie owners praise smooth ink and easy corrections but report pens that stop writing after heat exposure; Uni-ball's heat-sensitive ink is the same trade-off, so keep both away from hot cars.

Choose the Grabie Erasable Gel Pens if you want a broad color palette for bullet journaling, study notes and coloring.
Choose the Uni-ball R:E if you want a single fine-tipped black erasable pen for precise everyday writing.

Prices

Grabie Erasable Gel Pens: $17.99 at Findlay Rowe Designs (checked today)
Uni-ball R:E Erasable Gel Pen 0.5mm: $3.00 at kawaiizaki.com (checked today)
Difference: the Uni-ball R:E Erasable Gel Pen 0.5mm is $14.99 cheaper than the Grabie Erasable Gel Pens today

	Grabie Erasable Gel Pens	Uni-ball R:E Erasable Gel Pen 0.5mm
Tip size	0.7mm medium point	0.5mm extra-fine conical point
Color range	36 colors in four palettes	Black ink; other colors sold separately
Pack size	36 pens	Single pen unless a set is chosen
Eraser	Built-in eraser on each pen	Friction eraser in the push button that does not wear out or shed dust
Tip material	Plastic body, standard tip	Metal conical tip
Retraction	Twist-to-open, no cap to lose	Push-button with a lock that stops clicking while erasing
Heat sensitivity	Owners report pens stop writing after heat until frozen	Ink fades above 140°F and can reappear below 14°F
Best use	Journaling, coloring, doodling, planner decoration	Notes, forms and everyday writing where precision matters

Spec	Grabie Erasable Gel Pens	Uni-ball R:E Erasable Gel Pen 0.5mm
Tip size	0.7mm medium tip	—
Pack size	36	—
Ink colors	36 Colors	—
Eraser	built-in eraser	—
Ink safety	Non-toxic	—
Ink base	Water	—
Item weight	102 Grams	—
Item dimensions	6.3 x 0.51 x 3.54 inches	—
Material	Plastic	—
Type	Pen	—
Tip Style	Medium point	—
Ink Type	Gel	—

Spec	Grabie Erasable Gel Pens	Uni-ball R:E Erasable Gel Pen 0.5mm
Ink Highlights	Non-toxic, Erasable, Gel Ink	—
Age Range	All users	—
Typical Users	Students, Creatives	—
Packaging Highlights	Set	—
Ink Color	—	Black Ink
Gel Ink	—	Yes
Erasable	—	Yes
Point Size	—	Extra Fine Point

Grabie Erasable Gel Pens vs Uni-ball R:E Erasable Gel Pen 0.5mm

Prices

Grabie Erasable Gel Pens vs Uni-ball R:E Erasable Gel Pen 0.5mm

Prices

Uni-ball R:E Erasable Gel Pen 0.5mm

What separates them

Price history

Prices at every store