Don't get me wrong, I would love to get both games, but I can see how it's a tough call. These games come down to the text. You can't just do literal translations. Poor localization means poor game. Paying good writers isn't cheap. Advertising isn't cheap, and perhaps they just figure they won't get back what it costs to run the TV ads.
I'm surprised they're messing with DS carts.... again, love to fill in my collection, but with the past games coming on iOS the digital only format seems ideal for this series (and a format they could really milk if they wanted to get "greedy" - think pay for each case/turnabout)