To an extent, they are similar but I have done three years of camp. The first year that I went, the organisation I used wasn't terrible, but I didn't feel necessarily gave me much support whilst out in the US, so I decided when I applied the following year to go with BUNAC (as a lot of people at my camp had gone through them and recommended them) and they were brilliant! I found that they not only were really helpful and efficient in helping you organise your summer camp application and the visa but they are also excellent when you actually get out to camp. They came and visited me whilst I was there to make sure that I was happy and having a great time! So I would definitely recommend them, plus I found them to be a lot cheaper than some of the other companies as they don't make a profit from either you or the camp, so the initial cost is cheap for you and my camp paid me a higher salary at the end, as they weren't having to pay any fees to BUNAC.
Also I would not let the competition for places put you off applying. I applied really late and still got placed at a camp. It is just trying to sell yourself in the application as much as possible. If you want to do it, apply! You'll have the best summer ever! I have worked at an all girls camp in Maine for the last three years, teaching riding and also acting as a general counselor by living in the bunks with the campers. I get to spend all day out in the sun with horses, the campers are brilliant (I had the 14 and 15 year olds) and love hearing about England/ the English accent/ anything English and it is just such a lot of fun. Plus I got to go on some great trips, like to Canada and around Maine with the campers.
I think/talk about camp all the time and have met hundreds of people from literally all over the world! Plus because of doing camp, I have been travelling around a lot of the US both the East coast and the West coast and also down to Florida and then a bit of Mid-West, so pretty diverse! That is something that I just would not be able to afford to do if it wasn't for doing camp first and then travelling on my salary. I've had so much fun!
DEFINITELY DO IT!