"KP rules are simple and logical and accurate. Vedic has a lot of rules and books to get prediction and not so precise predictions.
KP Astrology versus Vedic Astrology
Krishnamurti Padhdhati (KP) Follows the Placidus system for the distribution of cusps. Vedic follows Sripat Paddhati.
Cusps start at the end of the previous bhava (sort of a boundary line or a compound wall) in KP. Vedic chooses midpoint.
KP Aspects are from degree to degree. Vedic astrology follows cusp to cusp Aspects.
Duration of Year of 365.25 days in KP but Vedic takes it as 360.
KP rules are simple and logical and accurate. Vedic has a lot of rules and books to get prediction and not so precise predictions.
KP is Logical and precise. Vedic has lost the accuracy of predictions because of missed data.
Ayanamsa plays a major role in giving accurate predictions. KP has its own single ayanamsa. Vedic has lots of ayanamsas provided by so many astrologers. Each Ayanamsa gives different values to Planets and Cusps.
One can learn KP in very few months but one cannot learn full Vedic astrology in his life.
Vedic cannot pinpoint the time of fructification but KP can tell the exact time of fructification of the event.
KP treats the 9th Cusp as the House of Father and 10th Cusp for social status/career but Vedic takes 10th Cusp for Father/social status/career.
KP follows the rules given by sage Parashar for Vimshottari Dasha/Moon. KP has divided each planet and cusp Sign (Dasha) into Bhukti, Bhukti into Antar, and Antar into Sukshuma in the same ratio as done by sage Parashar in Vimshottari Dasha. It gives accurate results but Vedic does not do so.
Vedic follows Navamsa of Moon Sign only but KP follows navamsa of Nakshatra of each Planet and Cusp.
KP introduced a new fast-moving point which can differentiate between two early births as twins, it is known as Fortuna.