I've been insured with Geico for about 20 years. I did on line quote a couple of months ago, checking the difference between my 2013 focus hatchback and a 2014 focus ST3. Liability premiums remain the same, the collision and comprehensive coverages increased due to the differences in the price of the ST3 compared to my 2013 SE. No penalty was assigned due to the type of car.
To quote you the actual dollar amount is meaningless, because automobile insurance premiums are determined based upon personal factors (including age, sex, marital status, the way the car is to be used and prior driving history of accidents and moving traffic violations) and the garaging location of the car--meaning city, state and neighborhood and the insurance company's experience in that area.
For example, in Georgia I am paying about half of what I paid when I lived in Brooklyn New York. At the same time Metropolitan Atlanta area is one of the most expensive auto insurance premium areas in the southeast due to traffic congestion, the number of accidents, etc.
Some companies today are including your credit score in the rating of your automobile insurance premiums. The theory being the lower your credit score, the higher the risk you pose to the company.
Bottom line, if you have a good driving record, and a satisfactory insurance history, securing insurance coverage on a focus ST should be no more difficult than insuring a Focus Titanium.