HD PENTAX-D FA 24-70mmF2.8ED SDM WR is Just a Tamron A007 OEM Variant

http://www.ricoh-imaging.co.jp/japan/products/lens/k/standard/hdpentax-dfa-24-70/

http://www.tamron.co.jp/lineup/a007/specifications/index.html

Someone cloned the two into an animated gif and got:

So, they are proven to be identical optically.