Hi,

Basically, Golem's goal is to build an accessible-to-everyone, distributed, supercomputer.

iExec's goal is to build a distributed network where anyone can monetize their computing resources and servers.

The 2 projects first goal (6 months after the end of the crowdsale):

"Brass Golem" proof-of-concept, in alpha testing now, is focused on rendering in Blender and LuxRender, it will be useful to CGI artists.

"iEx.ec v1" will allow DApps to launch off-chain computations and retrieve the results. Part of the solution to ETH's gas price problem (http://www.coindesk.com/ethereums-double-edged-sword-will-rising-price-hurt-users/)