When you go to a men"s store and the tailor fits you right there, you would be wearing a ready to wear suit or off the rack. 95% of men fall into this category and it is nothing to be ashamed of. You can get quality long lasting menswear off the rack, you just have to know wear to look. You also skip the wait.
The salesman or tailor did not measure you to make this garment specifically for you, he just made a general model fit correctly.
A Made to Measure (MTM) garment is by definition a custom garment. With a custom garments you get to pick everything from the fabric to the lining and we make you the model. Y ou will notice, the difference is in the fit. There aren't many things better than a Made to Measure garment unless you go bespoke.
Bespoke is a whole different breed of custom clothing. When you decide to create a true bespoke garment you will work with your tailor from start to finish and they will make your garment around you. If you can afford bespoke clothing you probably need a good tailor more than advice.