Is it for live or studio use ?
For my studio I usually choose a mic for how it sound. Then I put something like that in front of it.

For live purposes

So which sounds better on you voice ?

The question is which pop filter inside of the microphone is better?
I own a Shure SM58, and the pop filter is not bad at all. Shure's website specifically talks about a great inside pop filter on the 565SD so I am wondering whether that one has a better pop filter inside or the SM58.
I don't have the 565SD and perhaps someone who has it might be able to tell me :)

The re-issue of the 565 is explained on the Shure site as the partner of the old 545. It was common for people to sing into 545s, and they popped a lot - so people bought an odd shaped foam windshield. The 565 basket windshield just prevented the blasting. The filter material inside all of these has varied in type over the years, but the early 565s had a thin piece of black felt over the actual capsule, and then light foam on the inside of the basket - much the same as the SM58. I must admit I never even thought about the inside of the two baskets as anything special.