Rewarded more for visiting Pokestops I've never visited before?

I visit the same 14 Pokestops every day and get very poor results. I get more potions, revives, and RazzBerries than you can shake a stick at. When I get eggs, 3 out of 4 are 2km eggs. Getting more than 1 pokeball is satisfying, and getting a great pokeball is thrilling. I've gotta an ultra pokeball just once. So, that's how 100 Pokestops per week has gone for me.

Today, I got the chance to visit a Pokestop I've never been to before, and I got 2 ultra pokeballs and a 10km egg!

Are all Pokestops treated as the same? Or, will Pokestops you've never visited before give you a chance for better results?

From personal experience, no there does not seem to be a difference. I have a Pokéstop in range of my desk, so I can collect it periodically throughout the day, and there is no pattern to what I receive. Sometimes I get 5 potions, other times I get 3 ultra balls. It is pretty random assortment of different combinations of items received. When I go to different places and collect stuff from Pokéstops there, I notice no difference in what I receive. It is all pretty random, and I have visited Pokéstops over 1000 times.