I agree with earlier comments about grading companies they all make mistakes like our selves as we are all human. So preference is within ourselves when it comes to a choice who we will use as a grading company.
I used ICCS
for years as my grading Company of choice they make mistakes lots, under grade in certain area's over grade in others. The thing that really bothered me was that they graded cleaned coins as normal with no mention of the coin being altered this turned me off with them. Plus other thing I got tired of their soft flips very little protection for coins, no hard slab available.
I changed to PCGS
for my preferred grading Company they have the hard slabs to protect your coins that I really like, the True View photo with high resolution of your coins I love, the Registry Sets are fun to be involved with for collectors, and the recognition throughout the World as being one of the best or one of the best 2 grading Company's in the World today.
Both Companies grade differently I think PCGS
grades with more accuracy taking in more detail of your coin colour, rim nicks, scratches, cleaned, enviro damage, eye appeal just a few things that make them my preferred grader where ICCS
mentions none of these things on your flip.
Grading coins is something that everyone has an opinion on it can get heated between a couple of people at times. Kind of like religion and politics can lead to an argument, but all depends on how you grade coins like ICCS
or like PCGS
. I just think PCGS
is better at it although more cost than other grading Companies.