18" wheels size choice help

[Leepooley]

Hi I'm new on here but would like some help, I've just brought a mk5 gti 3 door and going to order some 18" wheels to replace the 17",  I've got a option of 18" 7.5j et45 or 18" 8j et45 not planning on dropping it a lot but just need to know what's going to look better? If there is much difference? Thanks.