Here's a fascinating one. The Mammoth Book of Threesomes has just been published in the UK. Yay! It publishes Stateside in November. I'm excited, I have a story in this collection! (More on that another day.)
Check out the yummy covers. The US is on the left, UK on the right. Personally I like them both, but I do think the US cover would be more likely to haul me across a shop to look at it more closely. That's because of the bold eye contact, (always draws me in) the full cover layout, and that dramatic title strap which naughtily suggests both bondage and censorship to me. The UK cover is softer, but it's beautiful in it's own way. Does it indicate the UK is more open to f/f/m, I wonder? Personally, I think we probably are. In the British erotica I grew up reading f/f scenes are fairly common, not so much Stateside. Of course some of us are doing our damndest to change that situation. Ahem. Grin.