Just got a batch of H23-600's in our loadout today... as stated there is no diff between this and the H21, aside from no need for BBC filters.
They definitely are looking at saving money (pennies) with the H23 though, the packaging is less than the H21 and definitely less than the H20 full color box. Brownbag no cables, not even the brown accessory box, its a cheap envelope. And, there was no mention on it of NOT using BBC Filters unlike the naggy sticker on the H21/H20, I did not even notice a mention of it in the manual.
Been using them for about a week now. There is a sticker on the box telling you to connect the BBC's
. Once you plug in the box and go through the setup, it will tell you to remove the BBC's.