Link L2: WDS vs stacion bridge vs MPLS/VPLS

hi everyone i asked which is better to do transparent link on layer two.

link with wds im listeninig that is no good because there are 50% minus of troughput. is true that?

Now my major question what is better MPLS/VPLS or bridge with stacion bridge. If wtih station bridge i have a transparent link so is not necesary one packeage more “MPLS” minus storage minus RAM minus CPU.
and what doyou think guys???