Blanik84,
HKA conditions do not seem so much better than KA, indeed are a bit worse. True, the company is growing fast while the expansion in KA is made up by only few aircraft. HKA is a relatively young company, officially joined the IATA in 2010 and owned by Hainan airlines. KA is a stable one, owned by Cathay Pacific.
Unfortunately we are not able to predict the future business of both companies, but if you're looking for a fast upgrade HKA seems the right place.
Safe flights