Why does Tramadol feel different than other opiates?

I mean yeah it still feels good, especially for someone without a tolerance to opioids, but it doesnt exactly give you that KICK of where your whole body melts and you feel super warm and start nodding off.

It just feels different, hard to explain how, but im sure those who tried it would understand. Yes it still feels good, and makes you warm, and cozy and relaxed and all, but just different without like huge "kick"

And im talking about the 50mg capsules instant release, so those are also the good ones.