Value of Clearance and creepage

Hello

Our customer will use ADuM6402.

Could you give me your advice what do below difference of value of clearance and creepage  mean ?

VDE document downloaded on your web site says below.

Clearance: Over 8.5mm

Creepage: Over 8.5mm

(Please refer attached file P.16 psition 76)

ADuM6402 datasheet P.9 table 16 says below

Clearance: 8.0mm

Creepage 7.6mm ( RW16 package) ,  8.3mm(RI16 package)

Regards,

Terumasa

VDE0884-10_8-28-13.pdf