Why is it assumed Nintendo is making money while Sony is losing it? Sony get a slice of all those 3rd party releases with no expenditure whatsoever. Have never sold the hardware below break even and invested very little with even R&D being tied into the PS4s budget using off the shelf components despite the powerful hardware. PS+ subscriprions and decent margins on memory cards.
I'd be amazed if Nintendo come close to matching Vita's profitability this time around.
As for which is better. Vita is a far better portable console than either the PS3, PS4 or Wii U so for games on the go is pretty much the only option for multi plat games.
However for Mario Kart and Smash Bros Wii U wins hands down. Are we done with apples to oranges comparisons yet?