Start with what you actually need to type and click
A keyboard and mouse pair is not one decision but three: the connection, the platform you play or work on, and how long you want the warranty to run. The brands in Keyboards and mice differ most on the second and third, so price alone will mislead you.
Start with platform support, because it rules products out fastest. 8BitDo lists pc, playstation and xbox, which covers a PC desk setup and console and handheld play from one catalogue. If you never leave a desktop, that breadth is irrelevant to you, but if a single controller travels between machines it settles the question immediately.
Compare entry prices, then read them as a spread
Two of the three relevant brands publish an entry price, and the gap is large enough to shape a shortlist. Kensington mice start at $6.99. 8BitDo controllers start at $19.99, a higher floor that suits a build where peripherals are bought as a set rather than one at a time.
Across the whole category the spread runs €6.13 to €126.27, so the cheapest item and the dearest one differ by a wide margin before you consider features. Use that spread to set your own ceiling, then check whether the brand you prefer has anything inside it.
Check whether the brand makes the peripheral you need
Product range is a quick filter and it is easy to get wrong, because several brands sell more than the category name suggests. 8BitDo lists controller, gaming keyboard and gaming mouse, so its keyboards and mice are aimed at gaming rather than office work. Kensington lists keyboard, mouse and webcam, a broader desk set that mixes input devices with webcams and docking stations.
AOC is the one to read most carefully here. Its monitor, gaming monitor and portable monitor list includes monitors alongside keyboard and mouse, so the peripherals are a smaller part of a display business. If you are shopping for a keyboard to pair with a screen, that is still a legitimate reason to look there. Its ips and oled tells you whether the display side is an ips or oled panel, which matters for the screen rather than the keys.
Treat the warranty as the reliability measure
Warranty length is the most honest reliability signal on a spec sheet, and these brands differ clearly on it. AOC offers 3 years, the longest of the three. 8BitDo offers 1 year, the shortest, which fits hardware that is cheaper to replace.
Kensington is the interesting case because its cover is not a single number. 1 year to lifetime spans a wide range across its catalogue, so the period you get depends on the specific model rather than on the brand. Read the figure per product instead of assuming one duration applies. If a long warranty is your main priority, weight AOC highest and check the exact model at 8BitDo before relying on it.
Confirm the connection and the support you will actually use
Wireless support is stated for 8BitDo and for Kensington, so a cable-free desk is available from both without extra research. Note that the listed support channels differ, and that difference matters more than it looks: 8BitDo offers email and help centre, while Kensington offers help centre and phone. AOC also lists help centre and phone.
A brand with only online channels will be harder to deal with if a keyboard stops registering keys, whereas phone support shortens the path to a replacement. Decide which channel you would rather use, then favour brands that offer it.
Check the region before you commit
Where a brand sells decides how quickly a replacement arrives and whether warranty terms apply at all. Kensington serves US, CA and CL, a wide list that covers most of Europe, the Americas, parts of Asia and the Middle East. 8BitDo ships to AR, AU and AT, a different and slightly different again set of countries.
Where they sit matters for who stands behind the product. Kensington is run by Kensington Computer Products Group out of US, and AOC by AOC International (Europe) B.V. based in NL. Reading the entity name tells you which company a claim is filed against, which is worth knowing before a long warranty is your deciding factor.
Weigh the brands you have not shortlisted yet
Once the three above are narrowed down, the broader Keyboards and mice ranking is the place to widen the list. The existing Kensington and AOC write-ups go deeper on the ranges described here, and the 8BitDo review covers the controller side that the platform list points to.
A quick pass through the other profiles helps you sanity check your pick. Glorious and Targus cover opposite ends of the same market, and Blackview, AGM Mobile and TECKNET ONLINE show how a comparable warranty and price story reads for brands you may not have considered. ALTERNATE is worth a look if you buy through a marketplace rather than direct.
A short decision path
If you want the longest cover on a keyboard and mouse, start with AOC at 3 years and confirm the peripheral range. If you want the lowest entry cost for a desk setup, start with Kensington at $6.99 and read the warranty per model, because 1 year to lifetime varies.
If you want one peripheral set that works across a PC, console, handheld and phone, 8BitDo is the only one of the three with pc, playstation and xbox on record, and its 1 year of cover is the price of that flexibility. In every case, finish by checking that the brand ships to US, CA and CL or your own market, because a long warranty is worth little if the replacement has to cross borders.