Originally Posted by JAMMINKRAZY

WOW thats the first time I've heard that one.

There are numerous threads about each of those engines. You just have to do some research.

http://www.rctech.net/forum/search.php?searchid=5395068

http://www.rctech.net/forum/search.php?searchid=5395075

Read a bit. You will get much better results this way, than asking people's opinion between 2 engines.

Most people will be biased towards what they run anyway, and you will just get a bunch of opinions.

At the bottom of the first page of v-spec results there is even a thread comparing the os to the jammin jpx(picco evo 2 copy).