Lab vs. Lab is always a little pointless to ask. It comes down to personal preference of what worked for people better than other labs. Some use better ingredients to make PIP easier to deal with, others are painful. Price is a big factor too. I take it by BS, you're referring to the Apotek Lab brand? I've seen some logs of it on various boards. Not much feedback on it though, so I can't tell you a straight answer on it.
Pinnacle is a good lab, lots of users are satisfied with their products so you can try them.