Earlier Brother model comparisons
Brother PT-110 vs PT-100: two M-tape handhelds with different controls
Brother’s PT-110 and PT-100 are different discontinued Home & Hobby handhelds, not spelling variants of PT-H110 or PT-1100. Their original U.S. brochures are more useful for this comparison than the modern specification panels: both panels carry tape information that conflicts with the model-specific brochures.
What the brochures say about the controls
The PT-110 Home & Hobby II brochure lists a 50-key alphanumeric keyboard, a four-character display, four text-size modes, six styles, 60 symbols and two-line printing. The PT-100 brochure documents two text sizes and four styles and shows its letter rows arranged alphabetically; it does not give a maximum line count. That omission is not proof that the PT-100 cannot print two lines, only that the sheet does not settle the point. If a two-line requirement is essential, the PT-110 brochure is the clearer record, but neither tiny display should be mistaken for a full-layout preview.
They share an older cassette system and battery burden
Both exact-model U.S. brochures identify Brother M cassettes at 9 and 12 mm and six AA alkaline batteries. That matters more than matching a nominal width: a 12 mm M cassette is not automatically the same thing as a 12 mm TZe cassette. Brother’s current U.S. pages show TZe widths for these discontinued models, which conflicts with their original brochures. The PT-110’s exact Brother Canada listing also groups M supplies with that model; use the cassette marking and exact unit documentation when checking a used machine, not the generic live table alone.
Choose for a real owner’s task
If you already own a PT-110, its brochure gives a broader documented set of type treatments and symbol choices than the PT-100 sheet. If you own a PT-100 and prefer its documented alphabetical key rows, the PT-110 brochure does not formally classify its 50-key layout as QWERTY or alphabetical, so do not assume the key arrangement will feel the same. Both require six AA cells; their brochures do not establish an AC adapter, phone or computer route, current refill availability, used-unit condition or specific durability on a surface.
Neither is a current-model recommendation. Use this comparison to identify a working legacy machine and cassette, not to infer that a marketplace listing is complete or that an old cassette will withstand a modern application. See the PT-110 review, the PT-100 review and the broader tape compatibility guide before deciding whether your job needs an older M system or a currently supported model.
Primary references: Brother’s PT110 US product page, the original PT-110 brochure, Brother’s PT100 US product page and the original PT-100 brochure.