Paraguay 150 Guaranies KM# 65 1973 Proof variation?

[Miguel del Rio]

Bought this Mixteca Culture coin recently from MA-SHOPs:

It has the same large 1000 fineness stamped between the denomination characters as does the Paraguay 150 Guaranies KM# 36 1972 Proof.

However, another example from NumisMaster shows a much smaller fineness between the denomination characters for the coin:

Other than paying the variant fee, is there an actual advantage to creating a slab which documents the variant when the variant is so plainly visible and the normal coin so well documented?

Thanks.

 

[Miguel del Rio]

The same variation can be found in the Paraguay 150 Guaranies KM# 37 1973 Proof.

This is a photo of the large purity:

This is a photo showing a half size purity typeface:

This is a photo of the official obverse of the 1973 150 Guaranies coins:

This is a photo of the Paraguay 150 Guaranies KM# 37 1973 Proof from the web page portalguarani.com/detalles_museos_otras_obras.php?id=17&id_obras=937&id_otras=155: