Lemania is a very reliable, ‘true historic’ movement. PP used it in the 5070 for a long time. I don’t think that using not in-house movement is a serious disadvantage for manufacture, just compare the current value of the PP5070 and PP5170. We know a lot of another cases when in-house movement value is less (AP 15202 Jumbo with the JLC base and AP15400 or 15500 for instance).
Regarding finishing of the movements - both Lemania in CdV and PP5170 are very similar, in-house PP is not winner in this component.