I am looking at 2 diamonds. One has excellent symmetry with very good polish and the other has excellent polish with very good symmetry. Which one would be better? I cant tell difference between 2 when looking at them.
It would depend on the cut....Do you have links or certificates you can post? There are some gorgeous "Very good" for symmetry stones that out perform "excellent"...
with princess cuts (or anything other than round), the symmetry could be "good" on the report and be stunning. In this case, both of the tables are large....But without seeing what they look like, I like the numbers on the first one better.
You can predict nothing about the performance of these stones based on the information on the reports. You should really consider working with a vendor that can provide you both actual images of the stones and ASET to get a clearer understanding of it's light performance.
Here is some additional information on symmetry and polish, neither are indicative of performance.