As mentioned comparisons are not allowed but I will say IMO the VP9 is one of the three very best striker fired pistols currently made. One of the others is also made in Germany and the other has been made for decades in various generations. I would also advise staying away from a very much hyped new striker fired pistol introduced late in 2016.
Another big plus to me with HK is you are getting one of the best lifetime warranties in the business but least likely to need it. Some of the others only offer 5 year warranty or even less.