If Ratchasan is the benchmark then Por Thozil is near best to Ratchasan. It has similar plot but the presentation and screenplay makes the difference. The investigation details presented and chemistry between the lead characters makes it interesting. I would say it's easily Sarathkumar and Ashok Selvan's best. No unnecessary character no songs. Starting from end screenplay keeps you engaged and ends with good message. Not only thrilling elements but the fun elements then and there keeps it interesting. I wouldn't be surprised if there is another part of this movies. Everyone did their part really well. Definitely watch it in theatres to experience the excellent thriller.