Checked the specs now. It looks like a step up on the S3 Mini anyway, and finally overtakes the S2 in most respects (though you may want to argue about the screen if it's a pentile), but as Slug says that comparison is becoming moot. One thing that's clear is that Samsung are using exactly the same strategy as last year.
The question is the processor. I guess it will be another dual Exynos 4, but if so that would be clearly inferior to the processors other manufacturer's mid-range 4.3" handsets have been using since last year (One S, RAZR M for example). That's my guess though (i.e. that this will be flogging old tech in a new skin) - we'll know whether I'm right or not soon ehough.
Well, I'm not the target market for this anyway.