Welcome aboard. You will find SGC is much more lenient on off centered cards.
Don't believe it. SGC used to be more lenient on o/c cards. Try submitting a borderline PSA card that doesn't have the qualifier; i.e., a straight 8 or 7 that you feel was lucky to avoid the qualifier. Betcha you'll get a half to full grade lower with SGC. SGC tightened up the centering some 2-3 years ago and what used to sneak by, now does not. I should know. I've been a long time, consistent submitter since 2001.
#1 in 1959 Topps. Officially known as Assassin according to stanthemanfan 3/31/2014 and god of minor league basketball according to cammb.