quick comparison 85 f1.8 vs 70-200 f4

Just got the 70-200 f/4. Don't think there's much difference in sharpness in the center, but those stars around the lights look much better defined in 85 1.8 AF-S. Anyone know why?  Both taken at f10, 30 sec. RAW, converted in lightroom without any changes., should be 100% (or close to) crop.

with 85mm prime

with 70-200mm