Welcome to the forum :-)
Short answer - no one can really answer your question.
Long answer - there are multiple extraction methods, multiple unidentified compounds present in plants used for extraction and possibly some of those compounds exhibit synergistic effects that can affect the experience as a whole. For example Toluene and Hexane extracted DMT are completely different experiences for me personally. Additionally lack of research and the fact the DMT is illegal hampers any attempt to decipher this riddle. It is one big unknown with many, many opinions and subjective experiences. This is what makes it so fascinating... :-)
Ps. Not to mention that our puny human brains will most likely never be able to fully understand what is happening. We evolved to run and hunt in Africa and not travel hyperspace. It's like trying to understand a tool using the exact same tool (brain) for that purpose ;-)
Be inquisitive and always question things...