Order of candidates

All,

Does it makes sense to order the different candidates inside the srcset
tag? Or are the following equal?

<img src="foo.jpg" srcset="bar.jpg 300w, xyzzy.jpg 600w">
<img src="foo.jpg" srcset="xyzzy.jpg 600w, bar.jpg 300w">

<img src="foo.jpg" srcset="bar.jpg 1x, xyzzy.jpg 2x">
<img src="foo.jpg" srcset="xyzzy.jpg 2x, bar.jpg 1x">

Cheers,
Peter