Can anyone tell me what is the difference between APE12 Persian/Median cavalry and APE20 Persian cavalry?

APE12 carry shields, APE20 do not.

Thanks, Peter, now I know which of them to order.

Er, unless the moulds have changed in the past few months both are unshielded (well certainly the figures I have).

APE12 are armed with bow and spear  APE20 are armed with just spear

I really do need to update the photos for this range.  These figures are my original sculpt, and I am really happy with my above reply.  Just to clarify:

APE12 - Spear, Bow, Shield

APE20: Spear

That's odd Peter, as I have double checked and none of the APE12 figures (including those in the photograph below) I've received over the years have an obvious shield on them. Have I missed something? 

As far as I am aware Persian cavalry never carried a shield and by the end of the Achaemenid period they had dropped the bow except in the eastern satrapies where they carried both javelin/spears and bows.  I had hoped that APE12 would be spear and bow armed to represent Bactrian cavalry.  I thought that APE21 Colonist cavalry were the only miniatures to carry a shield slung on their backs?

My APE12 don't have shields, just a spear and a bow case. Excellent for Median and Bactrian cavalry.