The ElectricInsight in SparkBuild only offers a limited set of analysis capabilities. It will read any annotation, but you won't get the job view or most of the cluster/parallelism oriented reports.
If you already have an existing Accelerator installation on that machine, you won't gain anything from installing SparkBuild (well... you would get ElectricInsight). The emake executables are identical, so just use the emake you already have…