QR Code Model 1 Model 2

What is QR Code Model 1?

The original QR Code, a code capable of coding 1,167 numerals with its maximum version being 14 (73 x 73 modules)

What is QR Code Model 2?

QR Code created by improving Model 1 so that this code can be read smoothly even if it is distorted in some way.
QR Codes that are printed on a curved surface or whose reading images are distorted due to the reading angle can be read efficiently by referring to an alignment pattern embedded in them.
This code can encode up to 7,089 numerals with its maximum version being 40 (177 x 177 modules).

Related page

Page you can look at for reference purposes.

QR Code Standardization   Information capacity and versions of QR Codes