That set from ebay is absolutely not official, I can tell you that for sure. Bootlegs like this are all over ebay. Infact, Disney related DVDs and Blu-rays tend to be the most widely bootlegged things I have ever come across. I would not at all recommend that you buy that. Also yes, The set that I posted a link to should have the newest transfers which are sourced from the same master as the 4k discs just downscaled to 1080p.
The back of that set from ebay doesn’t look like anything Disney/Fox would put out, and it’s being sold far too cheap, not to mention it’s unavailability from any legitimate retail site like Amazon. The previous set from Fox with only the first 6 films ran around $70-$80 in stores. Also, Disney loves their money. There is no way they would release a budget priced no frills set at such a low price point within the same year that they just put out a huge box set with bells & whistles. They aren’t the type of company known to do stuff like that.
Also, being that it is a counterfeit product I can almost guarantee that it does NOT feature the newest transfers, which is a moot point anyway.