What you described on the bottom is not unique to bespoke, these details can be just as easily adjusted on a made to measure suit.
What's unique about bespoke is that the tailor (technically, the cutter) will make a brand new pattern just for your body, which will be based on a much greater number of measurements. Also, the fitting of a bespoke suit involves multiple fittings (http://www.thesimplyrefined.com/wp-content/uploads/2012/02/B...), using each iteration to ensure a perfect "fit" in accordance with the tailor's vision.
Made to measure suits, on the other hand, involve a single fitting. After the fitting, the suit is made, and can only be altered to the same extent as, say, a standard size suit that you bought at a store.
What's unique about bespoke is that the tailor (technically, the cutter) will make a brand new pattern just for your body, which will be based on a much greater number of measurements. Also, the fitting of a bespoke suit involves multiple fittings (http://www.thesimplyrefined.com/wp-content/uploads/2012/02/B...), using each iteration to ensure a perfect "fit" in accordance with the tailor's vision.
Made to measure suits, on the other hand, involve a single fitting. After the fitting, the suit is made, and can only be altered to the same extent as, say, a standard size suit that you bought at a store.