Which companies grade the hardest..least amount of 10's based on

the amount of cards graded (PSA VS SGC). I took a look at 5 sets -- 1974, 1975, 1982, and 1983 Topps baseball and 1986 fleer basketball, to get a feel of how hard it is to get a 10 graded by SGC and PSA. I.E. the percentage that have been graded.
I found that 10's of these sets are not only harder to find in total, but much harder to get one graded a 10 -- BY SGC.
1974 and 1975 and 1982 It's 10 times easier to get a 10 graded by PSA
1983 is 15 times easier to get a 10 by PSA
1986 fleer baskets its 4 times easier to get a PSA 10.
I haven't investigated all sets, but this short trial seems to show that an SGC 10 card might be much harder to get graded and to obtain. A number reasons could exist for this.
1) SGC grades harder
2) the best cards get sent to PSA
3) PSA has been around a little longer
4) Early on SPecials to a few entities for mass grading by PSA
of 10's/total graded pop for that issue
Any thoughts?
Comments
OMG not completely on topic but do you want to see a Million dollar PSA submission?!
Spoiler PAIGE 10!
Just run the certs 66587723-66587827
 and the 9.5 grade. Small premium unless you hit a big banger. Then you have to find a like-minded sucker that is willing to shell out somewhere between the PSA 9-PSA 10-dollar point. Totally makes good business sense to throw a few bones like Fisk & Morris in the other thread to keep the customer hopes up and coming back for more.
The only reason why anyone would pay big money for an SGC 10 common is in the hopes that it will either cross over or can get cracked out and find its way into a PSA 10 holder. A 1986 Fleer Johnny Moore SGC 10 is great and all, but you're not seeing an outrageous price on it like you are with the same card in PSA 10.
color me VERY skeptical on a PSA 10 Paige. sure does look like a lot of space between the top of the card and the bumper...
George Brett, Roger Clemens and Tommy Brady.
There is always space on ‘49 Bowman. Here is the first card that comes up on EBay when I search 1949 Bowman Paige. Space looks the same.
Registry is everything for the commons. SGC used to have one, maybe they bring it back who knows.