having used and maintained both of these box's since introduction of N3 have found KV much more reliable and better overall level of service however does come with a higher initial cost but paid for itself twice over unlike SV which since launch has been constant issues with freezing and disconnects best period with SV was since the introduction of SMGO even although the number of channels where limited they where pretty steady but recent changes to these and box subs etc have gave me no option but to give up on SV and invest in KV.
overall picture quality there is no noticeable difference both a SD box's but KV has very little down time and disconnects at present and therefore in my opinion worth the extra outlay even if they do go down a SUB route far superior service MORE BANG FOR YOUR BUCK.