Reception assessments - England and Wales difference?

[Cat98]

Hi, I posted before about the Welsh baseline assessment for reception children and I have now found the grid. But looking at the age ranges specified it seems to require more from the children in Wales than the one used in England - am I reading them right? Links below (the welsh link is very comprehensive) but I'm sure I read somewhere that a level 7 on the English one would be considered advanced. Looking at the Welsh one it seems that the achievements in level 5 are considered average for reception children (age 4-5)? But in the English one some of these achievements would be considered advanced? I'm confused why there is such a difference (I'm looking particularly at the numbers category).

Thanks
Links below
dera.ioe.ac.uk/3642/1/110517foundassessmenten.pdf

cw.routledge.com/textbooks/9780415485586/data/EarlyYearsFoundationStage-AssessmentScales.pdf

Also another question (as its kind of related I thought I'd add it onto this thread!)
Do they make allowances for summer borns when assessing? eg would they expect more of a Sept born in reception generally? And at what stage does the age difference start becoming less of an issue? (it seems a lifetime when you have almost 5 year olds with just 4 year olds!)

Do they make allowances for summer borns when assessing No