I don't really have any older builds like that.
However, it is very unlikely that you will find any significant difference in performance between the two. The biggest performance setting you can probably use is hard shadows, as soft shadows cost more and use more texture slots.
If you notice better performance in the demos, that is likely because they are compiled with YYC, and when you run Eclipse in the IDE you may only be using VM. The performance difference is massive between the two, and you should first try running with YYC and see the difference.
At the end of the day, the engine is doing PBR lighting which needs a dedicated GPU for many reasons.