No CEEP does not have MB 229.71. CEEP that you listed is Castrol UK. BIG DIFFERENCE!
Bevo listed it actually. They don't sell a product labelled CEEP 0w-20 "Castrol Edge Extended Performance 0w-20" in the UK. Or Germany. Or Australia..... Only in N. America. (They list Swindon because that's their world headquarters.) You can get Castrol Edge 0w-20 V (V for Volvo; C5) and Castrol Supercar 0w-20 in the UK, and both of those are 229.71 according to bevo too, although not on the label, oddly! UK VW-Audi dealers may have the 508 Castrol like the U.S. gets, but no CEEP there either.
If bevo is right, CEEP is 229.71. SuperCar and their C5 0w20s too. Which could make sense if Castrol is selling whatever production stock they have of those 3 and bottling or tanking it for Mercedes dealerships, or plans to soon, similar to what they do in the U.S. by offering their 508-specific product only to dealerships, with ebay & ECSTuning able to finagle some for us anyway. Business strategery.
Pour point in those tables indicates more PAO in Castrol 0W20 available in Europe.
Here is Castrol Edge 0W20 LLIV msds:
Castrol Edge 0W20 LLIV MSDS PAO lowers pour point, and thinner base oils lower KV40 & CCS, so you are right the base oils are different. 508 Castrol has 1/3 PAO and is thinner.
For CEEP, https://msdspds.castrol.com/ussds/amersdsf.nsf/Files/B34A1D387D893D9C8025845700549A6C/$File/2518114.pdf that says it has zero PAO. I guess if we like PAO then we have to get M1 AP 0w20 or EP which is all PAO.