Yeah SK military has better gear, better training as well given how deranged NK training look likes and have the support of US forces stationed in SK, add on that US forces stationed in Japan and the Japanese Defence Forces as well which would not doubt get involved. NK might get some sever damage done to Seoul early on and some other border cities and towns but they are not going to win, once the SK gets properly mobilised and the US engages they are done for, and they know it, at least they should.