Oh, and about the inconsistency: yes, the wine wrapper /usr/bin/wine defaults to the loader (from wine32) /usr/lib/wine/wine, while the wineserver wrapper defaults to /usr/lib/wine/wineserver64. But that's absolutely correct:
Even if you run a 32-bit prefix wineserver64 is the right choice, you don't need wineserver32 for that. If you're building Wine from vanilla upstream for 32- and 64-bit you end up with just exactly that binary. And if you want something like vanilla upstream built only for 32-bit you just have to uninstall wine64, so that /usr/lib/wine/wineserver32 is used. The 32-bit wine loader is also the right choice for starting wine, even if you want to run a 64-bit Windows application. I'm quite sure that you're never expected to call wine64 directly. Greets jre