[Value of a named type] comparable with [Value of the same type]

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   type Cat uint8
var c1 Cat = 1
var c2 Cat = 2
fmt.Println(c1 < c2) // true

[Value of an unnamed type] comparable with [Value of the same underlying type]

value literal is of unnamed type

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   type Cat uint8
var c Cat = 1
fmt.Println(1 == c) // true

const is of unnamed type

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const b = 1
   type Cat int
var c Cat = 2
fmt.Println(b < c)
fmt.Printf("%T %v\n", b, b) // int 1

Two values of different types cannot be compared directly

Value declaration gives a type

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   type Cat int
b := 1
var c Cat = 2
fmt.Println(b < c) // invalid operation: b < c (mismatched types int and Cat)
fmt.Printf("%T %v\n", b, b) // int 1

I can do a conversion

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type Cat uint8
var c Cat = 2
b := 1
fmt.Println(Cat(b) < c)  // true
fmt.Printf("%T %v\n", b, b) // int 1

Follow the assignability rule for type conversion

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b := 1
type Cat uint8
var c Cat = 2
cat := Cat(b)
fmt.Println(cat < c) // true
fmt.Printf("%T %v\n", cat, cat) //main.Cat 1
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b := 1
type Cat uint8
var c Cat = 2
b = Cat(b) // cannot use Cat(b) (type Cat) as type int in assignment
fmt.Println(b < c) // invalid operation: b < c (mismatched types int and Cat)