We dont say "in hospital" very much, but do say "in the hospital" or "at the hospital."
I see the differences as these: we do use the British spellings, except for "tire" and "jail."
As for the actual spoken language, we have different regional terms, like other regions in
AmE. We use "university" for degree-granting public institutions, and "college" for smaller training and continuing ed places that are career-oriented (1 or 2 years = a certificate that gets you a job).
We do also say "eh" rather than "huh" to make a statement into a question, but not as often as comedy shows portray.
The major noticeable difference is the /au/ diphthong, in which we open our jaws much less widely than our US cousins. This makes it sound different, almost like the /əu/ in
BrE, or somewhere in between. So we say "out, house, about" in a way that Americans find sounds rather close to "oot, hoose, and aboot," though actually the truth is in between.
Other than that, there aren't many differences between our English and Chicago or Detroit. But don't ask me about the Newfies.
Oh, and we use the metric system, except colloquially we still tell our height and weight the American way.