PHP Imagick – Scale Image – output not satisfying

I’m trying to scale a png image. The top most is scaled by the browser (so on client side):

<img src="data:image/png;base64,{articleImage.fileContent}" style="max-width: 200px; max-height: 200px;" />

The bottom one is scaled by PHP Imagick (so on server side):

$image->resizeImage($newWidth, $newHeight, Imagick::FILTER_BOX, 1);

The scaled output is not satisfying to me. I played a lot with Imagick:FILTER_ and blur factor (1) – but didn’t achieved a good result. Any hint from your side? Thank you!

enter image description here