Planetology and Advanced Planetology

I currently have both these train to level IV, How much more accurate is the data at level V, is it with the 17 days plus 28 days to level V respectively?

I did planetology to 5 on all my alts, but only 1 to advanced 5. Meh, there’s a small difference, but I didn’t think it was worth the time for all my alts. That was in a C2 though…

Thanks MB, I think if the results are marginal ill leave them at 4