No it is not, the 1000ES has HD Reality Enhancer and Super Bit Mapping both do make a significant difference in image quality.
Now is the S1000ES worth the price tag? I don't think so, build construction wise it feels cheap and it does not have that many features (no Netflix, You tube, etc.; limited media playing - it plays MP3s but no MP2s and other media types).
No one has yet mentioned that the S1000ES cannot play recorded BRs, that is, if you record something on your PC and burns to a BR disc, you're out of luck with the Sony which to me leads to not being recommmended.