The contenders:
http://new.myfonts.com/fonts/adobe/vag-rounded/vagrounded-bold-2/http://new.myfonts.com/fonts/adobe/helvetica/rounded-bold/Looking through
Ripster's pics, neither VAG Rounded Bold nor Helvetica Rounded Bold are spot on.
The problem with Helvetica is the t's -the Cherry t's on "Control, Shift, and Alt" don't have the hook on the bottom. Helvetica's t's have hooks, while VAG Rounded doesn't. VAG wins here. +1 VAG
However, the C on the Cherries reach around more (hard to explain, but the C's go more around the circle than the VAG Rounded C's). Helvetica's C's are closer to the Cherry board than the ones on VAG rounded. +1 Helvetica.
Overall, I'd say go with VAG for those specific caps. But then, not every one is a font snob, and this is such a minor point to nitpick.
Also, while not on those caps, VAG's a is also off (the ones on the Cherries are double story a's, while the ones on VAG are single story a's, Helvetica is correct with its double story a's), which is another score for Helvetica Rounded Bold. Also VAG's numerals are off, while the ones on Helvetica are almost spot on. VAG also has a different R than the Cherry caps. Neutral because neither show up on Control, Alt, or Shift, but if you do different keys this will factor in. On the other hand, Helvetica has a different G than the ones on the Cherry caps (VAG's is almost spot on). Also, VAG's * is correct (6-sided), while Helvetica's (5-sided) is off.
If you ever want to do the whole set, consider mixing VAG and Helvetica.