Question on '54 Topps cards

I've been looking for a PSA 7 Aaron for my Milwaukee Braves collection and I saw these 2 current offerings on Ebay. I've been trying to get a feel for what to expect in this grade, but with all the rough cuts I've been seeing its been making my "homework" difficult. Do rough cuts have any effect on the grade? Obviously, the strength corners play a major part in the grade of a card, so how does PSA grade a example where the rough cut keeps the corner from being square? Are these 2 fair examples of 7's? Sorry for all the questions, but filling this hole in my collection has required a lot of saving and I just want to be sure I'm making an informed decision.
Link to auction
Link to second auction
Link to auction
Link to second auction
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Comments
Dave
1957 Topps 99% 7.40 GPA
Hank Aaron Basic PSA 7-8(75%)
My registry sets