I have the 300 and not the "T" version. I don't care for the flat crystal Seiko dive watch look much prefer the old school look with raised crystal as it should look. I like the beads of rice bracelet as well just like the Doxa should have. 300T isn't COSC certified not sure if that's what the cost factor is about.
Here's a pic from my phone showing the crystal
[url=https://flic.kr/p/2mdoQGZ]