ENO, TTTM, TrekLight - is there a difference?

I have used a Ticket to the Moon hammock for a couple of weeks - I never had the chance to see an ENO or TrekLight, but the photos look very similar (if not identical): is there a difference between these brands? Just asking because of those 3, the only brand easily available in Europe is Ticket to the Moon.

And while I'm at it - does anybody know the "Amazonas Silk Traveller"? Looks similar to the above brands - but also like a Brazilian hammock.