Externally we all started out as an anatomical female. Essentially a guy is a closed up female. The penis that grows is an enlarged clitoris. It has 3 erectile tissues in it, where as the clitoris has 2 erectile tissues. (clitoris does not have the urethra growing in it, so she does not urinate with a clitoris) Many people call the clitoris a small penis, but embryologically speaking it is the other way around. Both genders have labia in utero....the labia stay and persist in the female, but if it is a MALE, the labia close up. The seam seen on the underside of the scrotum (separating the scrotum into rt-lt halves-compartments to hold each testicle) and the underside of the penis (kinda looks like a scar, but it is NOT a circumcision scar, it is the seam where he closed up when his genitals were more female.
Not to derail the thread off-topic, but that is only the surface. The differences in nerve endings, positioning, and the way the nerves interact with the brain, plus brain thought patterns are generally VERY different from born-male to born-female. And only some of those can be changed with hormones (brain thought patterns DO change with female hormones, for example).
And that's only taking into account genitalia.
So, while there are some types of male orgasms that will feel similar to female, born-males (in general, there are always outliers) simply do not have the physiology to have orgasms the way females do. I very highly doubt they feel the same from a scientific perspective, and I, too, know those who have had sex changes and THEY say it feels different.
So, doubting that really doesn't make any sense.
I'll probably catch hell for saying something like this, but I'm not convinced that an MtF's orgasm post-op is identical to a biological female's orgasm. For one thing, not all women orgasm the same way. Some are wilder, some are softer, some rarely cum at all. And when you have a surgeon's knives messing around in that bundle of nerves, there's gotta be a change in sensitivity. So I wouldn't consider that proof of a difference between male and female orgasms, more like pre- and post-op orgasms.
Well, I agree with this, because... physiology. That said, the brain patterns (because of changes caused by hormones) are different, so how orgasms are experienced between men and women can be felt differently (and, indeed, are different).
Again, not to derail the thread. Orgasm is a personal interest and area of study for me. It's fascinating just how much goes into it.
I Write! A few of my books on Amazon: http://amazon.com/author/msnnotes