I made a little research but I found very difficult to discriminate their pronunciation. Also, I think that in informal speech it's harder to distinguish than in a slow and clear voice.
Then, in practice, Is there any difference between the pronunciation of "Write" and "Right"? Or the difference comes through the context that they are placed in.
In addition, if you could help me with a non-specific question:
Should I try to be more clear in my pronunciation rather than try to be more similar to native (US, UK, etc.) pronunciation?
I ask this because sometimes when I try to speak with a better pronunciation (like trying to remove my portuguese accent), it turns out to be more unclear, indistinguishable.