What is the difference between this two annotation files for illumina 450 methylation array?

IlluminaHumanMethylation450kmanifest: annotation files for the 450k array.

IlluminaHumanMethylation450kanno.ilmn12.hg19: annotation files for the 450k array.

Seems that in minfi both are used.

qcReport() calls getManifest(object) that uses ‘IlluminaHumanMethylation450kmanifest’

but 

mapToGenome(RSet) uses IlluminaHumanMethylation450kanno.ilmn12.hg19

One (IlluminaHumanMethylation450kmanifest) is a subset of the other (IlluminaHumanMethylation450kanno.ilmn12.hg19). Both contain the manifest object, but the latter has other data that the authors have added. The package insert for IlluminaHumanMethylation450kanno.ilmn12.hg19 has most of the details.