CRLB engine alternative

Hi,

Need to replace engine block for my CRLB engine on Audi A3.
Have found whole engine with CRB code.

Can someone please advise what are the differences? So far I have found CRLB uses 2 lamda sensors, but CRB only 1 lamda.

Could I use engine block from CRB and everything else from CRLB?

Thanks in advance.

I would need to be at work to look at this so remind me Monday with your VIN and if possible, the VIN of the donor vehicle.