961Mb is the reported size on the website
transmission reports 1.01 GB
(I believe the convention is to use MB rather than Mb; i did a copy/paste from the download page and just noticed the difference)
I'm assuming this will upgrade smoothly into final 14. Is that right?
I chose MATE over cinnamon because it is a larger iso, and because I trust MATE more. I still don't understand why there are different iso's, except as a bit of cuteness.