Thanks.
My thinking is that if the rod does not bend enough followed by the release (elastic effect), then that would negatively affect one type of slow jigging technique - the one where we create a curve either by pulling or by reeling, the curve straightens, and in doing so, pitches the jig up.
The reduced length will affect long fall but not by so much given the rod given is only about 10-20cm less in length. In fact, given that if the rod curves less, it will produced less movement for the long fall too because there will be lest elastic energy transfered to the jig.
Assuming same material and construction, a reduction in length and increased in thickness from tip to bottom is expected to decrease the curvature. There is a possibility that the material is different because of 'new material, more light, more power', but then the material and/or construction might be stiffer too.
About the max drag, as said, there are differences (contradictions) for the same item. On Tokayo website, the SJ3 SE X P3 is said to have a maximum of 27 kg but on their facebook page, many posts say 28 kg. About the rod having a lesser max drag because is for Tokayo only, I do not think so, because, to my knowledge, Tokayo focuses on maximum strength, that is the bigger the max drag, the better; they (at least A Ka, from what he told me) focus on catching the biggest fish.
Yes, I have the impression that the S is better, and is strange why discontinue something that had so much success and still have demand. I still think there is a problem at the factory or something fishy going on.