Major difference between USA Morgage and Canadian Morgate
(1) 15 year/30 year morgage is very popular in USA. Have not seen such morgage in Canada.
(2) Therre is no penalty in any morages in USA if you paid off your morgage early, which means you can make refinance anytime (you need pay closing cost when you make a refinance). You can also sell you house and paid off you morgage anytime. No penalty at all.
(3) The interst in USA is tax deductable, but it is only useful when the interest you paid is higher than certain amount (e.g. >8K), since you are allowed to deduct certain amount no matter you have morgage or not.