I only own the original complete series DVD set and the Blu-Ray successor, so this isn't 1st hand confirmation of what you're seeking an answer for. But the press release at the time stressed that these were the same transfers from the original 35 mm negatives as those used for the earlier Blu-Ray set, so it should be a safe bet (The older transfers were a generation removed from the negatives, as I recall).
Going off on a bit of a tangent, I wonder if those "episodes-only" DVD season set rereleases from 2014 that appeared after the Blu-Ray's (but before this complete series DVD reissue followed the next year), actually were only the episodes themselves with no bonus content? Their thinking was that the people buying this were only doing so to upgrade and would still have the old DVD's on hand if they wanted to view the extras that largely didn't see an upgrade.
But the press release for the compete series set from 2015 makes it clear that these discs are also the remastered versions, yet with all the extras included. So if the 2014 standalone season set reissues really were lacking all bonus content, that means they had to re-encode everything for the 2015 release.
Doesn't make much sense, especially since the standalone season set reissues still are 5 discs per season which has been the standard for this series on DVD. Why leave the extensive selection of extras off if it isn't going to enable you to drop the disc count from 5 discs to 4?
I still had S1 & S2 unopened from Sams when I got the BR complete series for ~$45. I quickly returned them and got back almost enough to pay for the full series upgrade!The episodes I've seen are in excellent condition! When I purchased this set it only cost about 1/2 what the DVD set costs. What a bargain!
Yes, I had the original DVDs. And Amazon had the whole set for a dirt-cheap price for a long time. It's a steal. Grab it while you can because the ones they have on Netflix are not as good. Amazon had the whole bluray series for as low as 30 bucks at one point. Now you can buy individual seasons or the whole thing.