i'm one of the biggest fans of Brioni on styleforum (and probably askandy, as well)-- however, if you're considering Brioni made to measure vs. a true bespoke, i think you might enjoy the rubinacci suit more, and with perhaps a slightly better fit.
This is a much different situation, considering brioni vs. a very high quality/ skilled bespoke service, as opposed to the debate i usually see on the forum (Brioni RTW vs. some lowbrow "bespoke" service by an oriental tailor, local guy who may or may not know his trade as well as the customer hopes, etc., but is very cheap). That's why i buy brioni off the rack-- it FITS well, looks great, and i know it is of a high quality make. I'm a perfect 42short in brioni, and judging by many of the photos of cutrate "bespoke" tailors, i think my RTW Brioni suits look 10 times better/ sharper. In your situation, though, I have to say i would go with the true bespoke from the well-known Rubinacci shop:
"The jacket was a brand-new style"”in effect a new style of life," continues Rubinacci as he leads the way to the front of the shop. "It was soft and luxurious, like a beautiful sweater, and like a sweater it allowed for total freedom of movement." He veers aside suddenly to greet two marchesi"”one in for a fitting, the other apparently just for a chat"”and as I watch them talking, I realize how perfectly adapted to the ethos of the city his father's innovation remains: Appropriately for the climate, the Rubinacci jackets on all three men are lightweight, with almost no apparent substructure, and yet they're so beautifully molded to the body that the fabric stays unwrinkled and smooth. At the same time, I notice that their wide sleeves and high armholes allow the arms free movement, without any wrenching at the shoulder. These jackets elegantly accommodate the second language of Naples: the gesturing hands, waving arms, shrugging shoulders that I see being deployed here too."