When do you actually need more than the cheapest chip?
Four triggers, and outside them the cheapest compliant chip is the right answer. Content that does not fit the free space. A need for identifier mirroring. A need for password protection. And a need for cryptographic authentication, which is a different class of product entirely.
The cheapest is usually right
A basic Type 2 chip holds a web address, reads on every phone, costs cents and does the job for the overwhelming majority of deployments.
Since the redirect pattern puts the content on a server rather than the tag, the memory requirement for most projects collapses to a short address. That removes the usual reason for buying more.
The four triggers
Content that does not fit. A contact card written directly, or Wi-Fi credentials, need noticeably more room than a link. Check the free space against the actual content before deciding.
Identifier mirroring. If each tag must deliver a different address and you are producing more than a few dozen, mirroring turns an individual encoding job into a single repeat run. It is the trigger people discover too late.
Password protection. If tags are exposed to the public and the content must remain changeable by you, a password is the right mechanism and it requires a chip that offers one.
Authentication, when the tag must prove it is genuine rather than merely hold correct content.
Authentication is a different category
The first three triggers move you up a range within the same kind of product. The fourth moves you to a different kind.
A chip that authenticates cryptographically can demonstrate to your server that it is the tag it claims to be, which no amount of content protection achieves. A copy holding identical content fails the check because it cannot produce the proof.
It costs materially more per unit and it is the only mechanism that survives substitution. Where product authenticity or access control genuinely matters, nothing cheaper works, and where it does not, this is money spent on reassurance.
What not to pay for
Write endurance. The figures are far beyond what any deployment reaches, and paying for a higher one is paying for a number rather than a capability.
Memory you will not use. A tag with a large capacity holding a short address costs more and reads no better.
Read distance claimed for the chip. Distance follows antenna size, so paying more for a chip in the same size of tag buys nothing you can measure.
And brand, where the tag type and the feature list already match. Two compliant chips meeting your specification are equivalent for your purposes.
Frequently asked questions
How do I know if my content fits?
Read a sample tag with a tool that reports free space, then compare against the content you intend to write. Guessing from the advertised capacity overestimates every time.
Is mirroring common on cheap chips?
It varies by reference rather than by price band, so it has to be checked specifically. Assuming it is present is one of the more expensive assumptions in this area.
Do I need authentication for a business card?
No. Nothing about a business card requires proving the tag is genuine, and the cost per unit would be hard to justify against a card that simply points at your page.
What if I am unsure which features I will need?
Buy a small quantity of a capable reference, prototype, then order the volume against what you actually used. Overspecifying a thousand tags is more expensive than overspecifying ten.