Hi, I own both of them. The bh016 is more expensive because of the ceramic antenna and longer battery life. The sound is pretty good and louder than the other one. However, on the calls the mic doesn't really have noise cancellation. The person on the other line will hear a lot of the background noise. Battery life last 30mins to an hour longer than the other one. And in terms of the IPX rating, I haven't tried, I don't wanna risk it as on the website it didn't say any IPX rating on this model. But it's built and feel is more premium than the other one. The bh025 has clearer sound but the volume is pretty low. But just get the right size rubber and you'll be fine. I believe this has better quality sound than the bh016. The mic's volume is pretty much on the low side as well, it has the CVC noise cancellation so the other person can hear you more clearly and with significantly less background noise. This has the IPX5 rating. This is a bit smaller and more lighter because of a smaller battery and I don't think this has the ceramic antenna. This model is not featured on the TaoTronics website. I hope this helps!