Ok.
Mig-29OVT is a prototype of plane Mig-29M/M2, and here already this plane (Mig-29M/M2) will rename in Mig-35.
Here small translation of some constructive changes:
"... This airplane possesses the raised maneuverability as it is equipped by engines with a turned down vector of draft. Jet engines MiG-29M OVT are capable to deviate on all axes.
By other airplane with a turned down vector of draft - Russian Su-30MKI and American F-22 - jet deviates only in one plane... "
http://rosprom.gov.ru/news.php?id=1442