Although I'm a Nikon user I can't help but be impressed with the Sony A7 series. Look at Gary Fongs YouTube videos. He was a famous wedding photographer who used both Canon and Nikon but has switched to Sony and for great reasons. The main one is mirror less and capabilities. The Sony you quoted (DSC-HX400V ) has a fixed lens and is basically a point and shoot.

Do the research on Google and YouTube. Nikon and Canon users will always be bickering until they pick up a Pro Sony.
Best regards,
George

I traded a Nikkormat ELW and 9 Ais lenses at Adorama and purchased the D5100 with the 18-55 and bought the 70-300. After 40 years the Nikkormat never let me down. Nikon RULES!