>>29515739Japanese trailers aren't perfect, some are great and others are just ok.
First big difference between the trailers, Jap version shows the middle evo's evolution screen where as the English trailer shows us the full line starting with the base form AND it plays the cries of each in order as they pop-up. Just on that alone I prefer the English trailer because the cries are nice and you get better perspective on the progression of the Pokemon through evolution. Japanese trailer shows the Pokemon at more angles and animations however you should note the English trailers shows amie footage as well whereas you'd forget that feature exists if you just watched the Japanese trailers.
-English trailer shows each island the new Tapus come from, Japanese doesn't
-Japanese shows more footage of the Tapu Z move which is nice
-Japanese trailer does a much much better job of introducing Cosmog and also shows off more of Persian
-English version tells us and shows us a bit about rebuilding the League, Jap version doesn't
-English version has an exceedingly better intro of Red and Blue/Green
At best you can say they're on even ground frankly, if you prefer the Japanese version then that's fine but don't be stupid enough to say the English version is dreadful and lacks effort. I like both and for these two in vids in particular I prefer the English version because of the way they handled showing the starters as well as the bit about the League and the cool intro for Red and Blue.
tldr, both versions are good; you're unfairly biased towards the Japanese version because of the white backgrounds that make it look a tad more professional