I dunno TBH, I've been on the fence about which I wanted for a while. I did order the sprint spoiler but cancelled due to lead time and I had to get a few repairs sorted.
Cost-wise I think you get more for your money with the cup wing, I think the sprint spoiler looks great but I think it's too expensive for what it actually is. Sprint is almost £200 for a 'lip spoiler', plus painting and fitting, or pay £25 more and get an actual, well, spoiler with end plates.
So in my head, the cup wing is more for your money - just me though.