My experience with Maxis, about 2 years ago, was that I had tons of unexplained issues with PSN. Just kept getting disconnected. Their BTU is exactly the same as the ones from TM. Only their router is crap, a N only wifi, with LAN ports limited to 100Mbps. Only the WAN is Gbps capable.  I believe it was the Technicolor TG784n v3. Can't remember other issues, guess it was either none or insignificant. Never tried torrent.

I junked Maxis soon after, and after switching to Unifi and using it for the pass over 2 years, it has been good with zero issues on PSN.