ok im a user of both papago M9 and sygic and let me give my opinion.
i personally prefer sygic as the interface is nicer, the rotation of map is also better in sygic, and most importantly, the pinch to zoom fuction. In papago, user need to press the + or - sign to zoom. and for rotation u can't control which direction u want to turn, u need to press the rotate sign and wait for it to rotate and when it reach ur desire rotation u press on screen to stop it.

papago POI and the whole route all seems to be too tiny in my 4" screen, and the way they arrange the UI doesn't help either (the upper left corner is irritating), sure, junction view is nice but its too distracting in my opinion, while sygic also has junction view but they remain it simple which is good enough for me.

now the good thing about papago is for course - the map and POI. most of the POI and jalan are updated and accurate, thanks to MFM. sygic on the other hands has quite outdated map and even worst, they even got some of the name road wrong! and I also like that papago has very specific jalan name.

so i put both navigation to the test, i set both sygic and papago to the shortest distance in settings, and then set to the same destination. both lead me to a different route and I found out that sygic was the one which lead to a better route (sygic suggested LDP while papago suggested federal)..

verdit: sygic is still my choice. i will only use papago when i need to search a road name

the 1st two i can tell u its papago, i already did a test, papago drains battery faster and when using my phone get heats up fast. 3rd question i think u know the answer.. papago has map updated almost every month if not mistaken

LOL i also have both in my phone right now.. now im waiting for google map offline to be launched.