The new high protein is higher carb, about 40-60g (preferably below 40) compared to 20g on Atkins, so they say you can have one piece of bread a day.. thats it really, after you have lost the weight you increase carb amount to 60-80g so you can have fruits etc... so really just higher amount of carbs,, I did it in the past and lost quite alot, found that being able to have a piece of toast in the morning sometimes really helped when I couldnt face more eggs!!
Im now following the 17 day diet, which is again very atkinsy,, except you do it in 17 day phases to supposedly trick your body so you dont plateau,, its in 4 cycles. Cycle one only lean chicken, turkey and some fish are the only meats you can eat, no rice, pasta, potatos, bread etc. But you have to have two pro-biotic serves a day, ie yoghurt, and two lower carb fruits before 2pm, no carbs after 2. Plenty of water.
Cycle 2 - You alternate with cycle one days. But now you can add other meats, beef, pork etc. And you get two serves of selected carbs ie 1 medium potato, 100g rice etc, but still before 2pm..
Cycle 3 - You can eat how you do in cycle two but everyday. You can add alcohol, but you now need to watch your meat sizes as you are allowed carbs everyday.
Cycle 4 - Choose on of the above plans to eat from Breakfast Monday to Lunch, then over the weekend you can eat your favourite food in moderation, not eating more than three favourite meals. Then get back on plan on Monday..
That is a brief description there are some other tweaks, ie you should exercise 17 minutes a day.. but ive been on 5 days now and doing really well. I like the idea of having small periods of time to focus on ie the 17 days at a time, and not having to exclude carbs forever,, so going to see how it goes,, really enjoying it at the moment... I use the atkins forums as they are very similar at the moment..