Which VPS is better to have a deal with - rockhoster.com or hostsailor.com?
Please, be more specific... I mean requirements: disk space, bandwidth, server location, budget?
Try NeironVPS.com ssd vps (https://neironvps.com/ssdvps.html). It has done a great job at evaluating the competition and narrowing it down to a handful of highly qualified services.