It depends, are you an occasional user, or are you a professional that goes through bits very quickly.
For the occasional user (like DIY or hobby), the 10 packs are probably most cost effective.
For the professional user that runs through bits quickly, the HiQ Bits will last longer.
I don't use the bits enough to say whether the cost balances out over time. The HiQ coating will save you a little time in bit changing, and looking for a new bit if you wear one down.