By definition ORTF requires small-diaphragm, single-diaphragm, non-side-addressed condenser microphones that have very flat on-axis frequency response. The 110° included angle and 17 cm spacing aren't magic; what counts is how they combine with the behavior of the type of microphone for which this technique was designed.
Your setup will have distinctly different characteristics because of the type of microphones you're using: less-even distribution of apparent sound sources across the stereo field, reduced spaciousness, and a greater high-frequency roll-off of the reflected sound as compared with the direct sound pickup. Actually, I tend to like that third part myself, but I'm just saying ... if you're only using the specified angle and spacing but not the intended type of microphone, it's not ORTF, any more than it would be if you used the right kind of microphones but not the specified angle and spacing.
--best regards