I read them, but I didn't really can find any rates for comparing.
Does anybody knows rate and power calculations?
They didn't give them. Its a student project, and to give credit its a fair analysis and implementation, but useless for mining bitcoins. They did not specify which Spartan-6 development platform they were using (but it certainly wasn't an LX150), and their results were fairly pathetic (3.8MHash/sec, I've done better on an LX9!!). They then went on to try multiple cores (bitfury might be flattered, but its not the approach taken by our commercial LX150 mining boards), and finally a port to the Zedboard, which with 85KLE should have given them a performance in the 100s of MHash/sec, if they did it properly. But rather than giving the performance figures they rabbited on about the Cortex A9 cores and embedded linux.
TL;DR just ignore it. They did a bitcoin miner on a Zedboard. Good for them (nice student project). If you happen to have one lying around then you may want to repeat their work and port the open source miner, but don't expect much return. Or if you want a real challenge, write a scrypt litecoin miner. I've got some code on my github to start you off (shameless plug), then you might look at utilizing the board's SDRAM for additional performance.
PS For some unfathomable reason they decided to run bincoind on their Zedboard A9 linux cores (ie solo mining, WTF???). Maybe so they could back their claim of an "efficient and complete Bitcoin mining system", well IMHO its neither efficient nor complete (OK, no need for a pool if solo mining, but they are never going to mine a block). Who are they kidding (other than their professors )?