I am currently creating two similar maps with the same basic layers, including same basemap. I am exporting the mxd as a pdf with the exact same parameters, yet one comes out pixelated, and one is smooth (see attachments). I have tried different options for export from Compression to Picture Symbol (i.e. switch default from "rasterize layers with bitmap markers/fills" to "vectorize..." yet no improvement on pixelated figure. Data is the same for figure samples.
Pixelated map is 3Mb and the smooth map is 1Mb.
Has anybody experienced a similar issue?