I honestly havent tried DPT yet, but am familiar with it, and it is my understanding it is one of the strongest trips around. Right on the same level with dmt, definitely, plus increased duration and maybe even increased negative side effects.
I've tried DMT and DPT approximately an equal number of times, which is not that many, but enough to know the characters of both.
Overall, I would have to say that:
DMT is friendlier, more euphoric, feels better in the body, and is less mentally challenging. It is also WAY shorter acting, and MUCH easier to get into your bloodstream (provided you are working with DPT HCl, like I was).
DPT is not as friendly as DMT mentally. It is a little more like LSD in that you are on a rollercoaster, and you don't know where you're going next, but you're going there REALLY FAST and INTENSELY.
DMT has next to zero body load for me. DPT on the other hand hurts like a motherfuck when you snort it and has a absolutely terrible drip. When I used DPT without ketamine, the muscle tremors were WAY worse than I thought. I thought I was going to have some twitchy muscles / MDMA-like tension in non-jaw body parts....but noooo, my fingers clenched into fists, and I could feel energy pulsating in my forearms so strongly that I didn't know what to do besides ask my tripping buddies to hold my hands because I thought that physical contact with other humans would somehow transfer some of that energy out of me and into them - didn't work so well.....hahaha, well you try excercising some rational thinking at the peak of 120 mgs DPT insufflated.
I say DMT is less mentally challenging because: Once you smoke DMT, you're along for the ride and you basically just have to "sit back, relax, and float downstream", and then it's all over relatively shortly. On DPT however, you're on a 2-4 ride that is more akin to the peak of an LSD trip than it is a "cousin of DMT", if you know what I mean. When you ingest DPT, you gotta get yourself through that long haul. It's not like DMT where it's over really fast.
Also, working with the HCl is less than ideal. I think the best way to do DPT would be to smoke it. Seems as though it would be the easier way to titrate a dose, have the least amount of time to deal with the crazy body feelings, and best of all, no god-awful DPT burning it's way down the back of my throat for 12 hours. The drip from DPT was VERY VERY noticeable well after the experiment was over.
That being said, I don't want to scare you away from DPT. It's quite a different animal than DMT. At least that is the case when comparing smoking DMT to snorting DPT. I bet smoking DMT and smoking DPT would be a lot more similar to each other than the smoking/snorting comparison.
The visuals from DPT i thought were more in line with stuff that I've seen on LSD and mushrooms and 2C-E, the visuals I get from DMT are very unique, in that they are sooooo deep in my minds eye that they are hardly even visuals in the same sense that I get visuals from LSD...anyways, i'm gonna wrap this up now, by saying that...
...mix ketamine with DPT !!!! It seems to significantly reduce the crazy muscle tension and adds a some delicious dissociation, which I think is always a welcome addition to the tryptamine experience.