What is storage footprint of Win 10 clean install? topic

As per the title, I'd like to know the install size of Win10 tech preview 2, and if it is any different when installing on a smallish (32GB) space than versus a larger HDD.

How many partitions does Win10 create, and what are their sizes?

Basically, I'm trying to ascertain if Win 10 is any more space optimized over Win 8.1. Thanks.