Yes, without the PE there are some things to scratchbuild. If you use the instrument panel and side console decals there are a couple of small plastic pieces that must be scratchbuilt but they are very simple to fabricate.
When I planned my project the Weekend Edition was on sale and the Eduard PE for the Academy kit was on sale later. I saved a bunch of money and the PE fit the Eduard kit very nicely. Also you're limited to one decal option with the Weekend Edition. I wanted to build a DDR airplane anyway, so it worked out great for me. When I build my next one I'll probably spend the extra money for the ProfiPACK version (especially if that F13 is ever produced
).