That EF Digital Sans is spot on! I did some further searching and found a Bold and Bold Italic variation which looks much closer to the weight of the box lettering. The only small problem is that the characters "D," "P," and "0" have their holes filled in with black while the italics version doesn't. A strange oddity. Perhaps it's a bug in the font? I don't know how fonts work at all.
http://fontsov.com/font/digitalsansefbold47553.html
Had a look at that font. As I thought, the element directions are causing the problem for 0, D & P.
In layman's terms ('cause I'm a layman/amateur typographer myself):
Most, if not all, digital typefaces/font files like True Type, Open Type, Post Script, etc., are simply collections of closed lines that run in one of two directions: clockwise or counterclockwise. The difference in direction between two boundaries will determine how the resulting space is "filled":
• The background space is "white/empty"
• Counterclockwise lines start "black" spaces
• Clockwise lines start "white/empty" spaces
• When the lines are in opposite directions, a "black" or "white/empty" results (outer-to-inner direction)
• When the lines are in the same direction, the resulting "color" remains the same (the grey line shows the results of the direction problem in the example)
And that is what happened to this font. I've fixed it and tested it in MS Word -- the regular font linked above has the problem; the fixed version does not.
PM me your address and I'll send you the fix, MI.