Possibly, but if that’s the case (and the Globe would have to be built with “airlocks” to allow it), you’d think that they would reverse the continents so things looked correct from the inside. That’s what the Mapparium globe does.
I don’t think it’s an actual sphere. The thing is, it’s not really an accurate representation of the planet. It looks like everything has been shoved into the northern hemisphere, and the Pacific Ocean looks way bigger than it really is.
Actually, that Pacific coastline looks pretty accurate. So does the Pacific, itself. Grab a globe and take a look at the Pacific. It basically takes up half the planet.