These appear to be the original, wide stereo mixes.
The remixes done for the 2 on 1, Legendary, From Surf City... is another discussion.
One Way releases narrowed some of the ultra-wide mixes and sounded if the highs were rolled off and the overall mastering sounded very flat. One Way has the advantage of almost being a complete set. The C5 releases were pretty good, overall slightly rolled off but decent. BGO are OK -- some original mono mixes which are nice.
The Toshiba-EMI has crisp, dynamic sound with some punch. Being old tapes, all of the original mixes have the occasional sonic flaw -- momentary dropout, etc., flaws that original pressings may not have. With some work to fix the effects of age and use, I suspect these Toshiba-EMI CDs would make a great starting point to get "definitive" versions of the original mixes.