Were both of these sculpted by the 4 horseman? If so are they DCUC scale?

Yes, check this link:

http://fourhorsemen.biz/gallery/batman/index.htm

Unfortunately, the Joker is a little undersized in most fan opinions. This is not a fault of the Four Horsemen, but Mattel production.

This figure (set) and many others along with it are flooding at Big Lots!

I think the joker could be a little bigger, but its a great looking figure regardless, its one of my fav 4hm DC figures.

Keep in mind that this exact same Joker sculpt is coming out single-carded in the DSCH line later this year, but in fugly orange pants. It's worth the extra $2 to get this two-pack at Big Lots now if you want Joker in your DSCH collection. You can always give the funky Batman to a kid.

Wakko

That's what I did when I found out about the fugly orange repaint. scooped 'im up nice a cheap a Big Lots. I probably use the batman figure for a custom, though

I agree that is a great sculpt on the Joker. I'm glad they are re-releasing these.