There are some clitchçes about arquitectural design logos. One of them is bold fonts. Cube it's also one of them. Designers are using san-serif fonts that could be looks similar but they not, There are quite a few details that made each font and letter unique. Check it out specially, in this case, letter S. By example, in all my entries for this projects I've used 7 different fonts: code pro, simian, futura LT, gabriel sans, microgramma, stone sans, ... and all of them looks for you as "helvetica" but they doesn't at all. If you like a "heavy" logo or symbol, would contrast such weight with a very light font san-serif. Hope this helps. :-)