Not being expert in this and being away from those more so than me at the moment, the Sailor part is easy. We've used Cobham Sailor since 2014. Always very happy with it. Use it for internet, satellite phone, and television. Sea-tel, being their internet brand.
My understanding of Sailor/Viasat is that it's a co-branding of Sailor equipment using Viasat's terminal and on board system. I do not have experience with that version but trusting Cobham/Sailor would feel pretty good about it. I see they are using the latest satellite equipment except for the Sailor XTR, which is more a commercial product.
So, guess I can help on half your question.