They are different linguistically, slightly so in terms of vocabulary and strongly in terms of grammar. But yes, they are similar when it comes to distorting information about Christ. It is a good idea to compare anything in a Hebrew Bible against the Vulgate to check for doctrinal problems.
I think you can find some decent Hebrew manuscripts outside the butchered Masoretic text, but yes, I would take the Septuagint and Vulgate over any Hebrew manuscript, as there was a deliberate and concerted effort to remove clear references to Our Lord as Messiah from the Hebrew.
I consider myself a somewhat educated person as well. 4 years of Latin, 3 years of Greek in High School. Double-majored in Greek and Latin (so 20 total classes) at University. 1 year of Biblical Hebrew. Finished Ph.D. coursework at The Catholic University of America (just didn't finish the exams and dissertation). I went there due to their unique emphasis on Biblical, Patristic, and Medieval Greek and Latin. I read most of the Sacred Scriptures in non-vernacular languages, Hebrew, Greek, Latin ... and read voluminously from the Church Fathers in the original languages. For about 2 years, I was the Staff Editor of the Fathers of the Church translation series published by Catholic U (editing and correcting translations that were submitted, and in one case basically writing it myself under time pressure because the submission was so bad). I also took graduate level classes in Philosophy and Theology. Of course, with the latter two subjects, I learned more in about 3 months at Traditional seminary than in all those classes combined. I also took some higher-level classes at Physics and Advanced mathematics. I worked at NASA as a lead software engineer for about 4 years. And I hold that the world is flat, due primarily to various experiments that falsify the globe and which cannot be explained by ball theory.
I don't have a major horse in this race, as I am open to either conclusion. I was skeptical at first, and it took me two years of delving into the matter on and off before I came to the conclusion that the surface of the earth we live on is (basically) flat.