York Cassette, different Kw ratings to condenser unit

I recently purchased a used York cassette system rated as 7.0 kw cooling 7.1 heating for the condensor.{ model MOH25R15A } the cassette is however only rated at 5.93 kw cooling and 6.3 kw heating {model JKH24G17} can anyone help with what KW rating this airconditioner will run at ??. and if this is normal to have different size outputs between head and condensor on split cassette systems? also cannot find any info on the cassette unit itself?J{JKH24G17}