What’s the difference between a Tihetuka Patisandhi and a Dvihetuka Patisandhi?

OK, so a better way of rephrasing my question is
“What’s the difference between a Tihetuka Patisandhi and a Dvihetuka Patisandhi?”

Is this the best translation? www.buddhanet. net/pdf_file/abhidhamma.pdf

I saw Bhikkhu Subhuti criticized Bhikkhu Bodhi’s work elsewhere

Of the 2 classes. 3 roots means that there is Wisdom (amoha).
That is the main thing. Many people can talk, but few are wise.
The standard description of the Dhamma.

“Svākkhāto Bhagavatā Dhammo,
“The Dhamma has been well-proclaimed by the Fortunate One,

sandiṭṭhiko, akāliko, ehipassiko, opanayiko,
it is visible, not subject to time, inviting inspection, onward leading,

paccattaṁ veditabbo viññūhī” ti.
and can be understood by the wise for themselves.”