Hello, I would like to know if anyone did use/try both Systems? Can point out the differences and which one for him is the better System and why. Thx

There's a thread on Aussie Stock Forums. Guys there are using it and prefer it to Amibroker. One thing they like is that it's very easy to combine multiple systems in a single backtet (although advanced AB users will probably be able to do that anyway). It's much faster than AB, apparently. It also offers some different forms of optimization, but I have no idea if they are any better.

so it appears realtest can only be used for daily or higher timeframes, whereas amibroker supports even tick data