Print holes between layerszits

First picture is two prints using the same settings first print (right) is mostly fine other than a pressure advance issue. Second print (left) has some nasty seams, what looks like holes between the layers. Second pic has clearer image of uneven layers.

Both printed in pla with a .6mm nozzle at 205 c, 200mm/s speed, 6000mm/s acceleration. Layer height of .48mm.

Any idea what would cause the massive variation between these prints and how to avoid it in the future?
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