I really liked Hard Reset despite a few flaws it was a great kickback to the sort of UT games of old and was quite difficult and action packed, very fun to play and great to look for secrets and such.
I did want the redux and this is a great offer but after reading about the possible graphical downgrade and checking the comparison video above, I think I'll have to skip. There is obvious graphical downgrade there.
The devs responded here
http://www.pcgamer.com/hard-reset-s...s_source=steam&ns_linkname=0&ns_fee=0
But while they address the added SSAO which to me looks worse, and change in filtering which again looks worse, they also skip over the effects which were obviously changed such as the lighting, missing particles and worse flame effects and such. The response to the mega thread on the steam forum is also lacking, the devs just went silent.
In a redux which is meant to be specifically better than the original this is big egg on face for them which is a shame really. I'd expect pretty significant graphical upgrades to the game for a redux but for it to be step backwards is a massive shame.
Just to correct the OP, the 10% off is good until 10th June but the 85% off for prior owners is a lifetime deal and it doesn't stack with other deals so it's about as cheap as you'll ever get it right now.