They work differently. Try this example:

#+BEGIN_SRC emacs-lisp :var x="hi"
(message x)
#+END_SRC

tangles to

(let ((x (quote "hi")))
(message x))

but this

#+NAME: x
#+BEGIN_SRC emacs-lisp
"hi"
#+END_SRC

#+BEGIN_SRC emacs-lisp
(message «x»)
#+END_SRC

tangles to this

(message "hi"


Sincerely,

Grant Rettke

On Mon, Dec 25, 2017 at 6:45 AM, numbchild@gmail.com <numbchild@gmail.com>
wrote:

>
> I see. I will use noweb style for now.
> But should tangle expand :var variables when tangling? I think this is the
> correct behaviour.
>
> [stardiviner]           <Hack this world!>      GPG key ID: 47C32433
> IRC(freeenode): stardiviner                     Twitter:  @numbchild
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> Blog: http://stardiviner.github.io/
>
> On Sun, Dec 24, 2017 at 11:40 PM, Grant Rettke <gcr@wisdomandwonder.com>
> wrote:
>
>> > Here is a quick test:
>> >
>> > * Test tangle will auto expand and substitute :var
>> >
>> > #+begin_src js :tangle kk.js
>> > console.log("hello, world!");
>> > #+end_src
>> >
>> > #+begin_src js :var name="chris" :tangle require-kk.js
>> > // require("kk.js");
>> > console.log("Hi, ", name);
>> > #+end_src
>> >
>> > #+RESULTS:
>> > : Hi,  chris
>> >
>> > #+NAME: check whether tangle expand and substitute :var
>> > #+begin_src shell
>> > cat require-kk.js
>> > #+end_src
>> >
>> > #+RESULTS: check whether tangle expand and substitute :var
>> > : var name="chris";
>> > : console.log("Hi, ", name);
>> >
>> > The upper result should be: ~console.log("Hi, ", "chris");~.
>>
>> Here are your two source blocks. They each do literate programming,
>> one with Variable style and the other with Noweb style. When you
>> evaluate them you get an identical result. When you tangle them you
>> get two different pieces of code, that generate the same result. You
>> can peek at what the tangled code will look like by calling
>> org-babel-expand-src-block inside the source block. That is how it
>> will look in the tangled file. I think that want Noweb style.
>>
>> When I use the Variable approach like this
>>
>> #+begin_src js :var name="chris" :tangle kk.js
>> console.log("Hi, ", name);
>> #+end_src
>>
>> I get this in the tangled output file
>>
>> var name="chris";
>> console.log("Hi, ", name);
>>
>> When I use the the Noweb approach like this
>>
>> #+NAME: name
>> #+BEGIN_SRC emacs-lisp
>> chris
>> #+END_SRC
>>
>> #+NAME: org_gcr_2017-12-23_mara_3D887FDD-163D-4BE1-80E8-464BF29DABEA
>> #+BEGIN_SRC js :tangle noweb-kk.js :comments no
>> console.log("Hi, ", "«name»");
>> #+END_SRC
>>
>> I get this in the tangled  output file
>>
>> console.log("Hi, ", "chris");
>>
>> WDYT?
>>
>
>