I have been using Fender 9050s (M) for years and just put on a set of D'Addario ECB82 Chromes on my '88 P-Bass (Japan) w/ EMG pups on it.
The tension is pretty close, but I would say the 9050s are a bit higher on the tension. To me, the flexibility of the strings are comparable, with the Chromes being a bit smoother to the touch.
However, regarding tone, I found the 9050s to have a more balanced, full, and consistent tone all around. I may need to give the Chromes more break in time (put them on last night), but so far, the 9050s sound more alive to me--somewhat richer and fuller frequencies. However, these are still flatwounds, so they aren't nearly as rich as roundwounds, to me at least. The Chromes sound a little--just a little--deader fresh out of the package.
I am going to give the Chromes a few weeks, but after being on 9050s for almost 10 years, my first reflex (after plugging into my amp) was to put some 9050s back on.