Sorry, I'm an idiot.
Would a tornado this big has slower wind speeds at its base than a thinner tornado?
Or is it just equally as fast and just covers more area?
Oddly enough, it depends (you can have violent winds in both smaller tornadoes and large wedge ones like above), but the big, wedge shaped mile-wide tornadoes tend to have very strong winds. Most of the top 10 wind speeds recorded in tornadoes came from big ones.