This is the BETA market which will use different servers from any main/live servers (basically each market has its own servers) so I do not believe you'll be able to use this account on any other market.
Most of the time InnoGames keeps the accounts on the beta separate from the live servers and thus the diamonds are separate too. At least that has been my experience.
Yeah i only wanted to be sure. I never invest into a beta or on Beta Servers. So i have to wait until release. Hope the developement Speed will be like FoE. At the Moment there isn't very much to do here and only so few buildings / Units