It's similar, but not quite the same.
Currently BMW uses CLAR for both BEV and ICE. The architecture has been modified to allow for both electric and combustion power trains. This is why the i5 and i7 have a transmission tunnel, even though they don't need one in EV form. Because that vehicle needs that to package the combustion engines.
This is sound in principle because it means you have unified (if subjectively ugly) designs for both ICE and BEV.
Mercedes MMA takes the same approach for their commodity vehicles, for cost reasons I imagine. The CLA to be unveiled next month can accommodate both BEV and ICE power trains in the same platform and body.
The difference is at the mid to high end. Currently mercedes has EVA2 for the EQ series and MRA2 for the ICE series. The EQ cars are horribly ugly homonculi due to their aero obsession. Meanwhile the ICE cars look pretty lovely in my opinion.
Going forward from the introduction of MB.EA-L they will keep the same strategy of a dedicated BEV platform for EVs and dedicated ICE platform for ICE cars. That way both can be uncompromised in their packaging. However the big change in strategy for them is to no longer have soap bars on wheels for EVs, but instead use the same external design and shape for both BEVs and ICE/PHEV so they look the same from the outside. Underneath, they will probably use a unique platform depending on the power train choice by the customer.
So if they want and E.class EV it'll be on MB.EA-L. But if they want an E.class hybrid or combustion model, it'll be on MRA2. But either way it'll look the same.
So in essence. You pick the model you want , and then you pick the power train, and you don't have to worry about anything else.
I think BMW will probably be converging with Mercedes in the same way when NK is being introduced. At least for the new 3-series to begin with. BEV will be NK, but the ICE 3er will probably remain in CLAR, but they'll have similar outward appearances.