You appear to have fallen into the trap of thinking that kilt makers actually tailor the jackets as well. I have had a look at Evelyn Spence's website and it is quite clear to me that she is using the same suppliers for jackets that the rest of us use. On that basis her made to measure jackets will be no worse, and no better, than any other kilt maker can provide to you. The only possible differences being price and customer service, which I am sure will be just fine

I would ask why you think you need made to measure though. It adds to the cost and is rarely needed as most people can fit into standard stock sizes. Made to measure is NOT the same as bespoke though, and like the rest of us she does not appear to offer a bespoke service