Which water pump

I saw that 1.5 tsi have 2 models of water pumps. First is with plactic thermometer housing, another is with aluminium housing.

I suppose DADA engine had that one with plastic and DPCA with alu. Or not.

Do somebody can confirm that. In catalogues and literature, its all mixes, but first can be dissembled and changed only pump or only thermostat.

Aluminium one have bolts bur you can buy only whole package. And its more expensive. It have ekectronic thermostat yeah.

Here are some pics..