about data tokenizer

[JYlsc]

hello, i see tokenizer seq in paper is :
[u1] [C] [u2] [C] [res] [C]

but tokenizer in code dataset is :
[speaker1] [u1] [eos] [speaker2] [u2] [eos] [bos] [res] [eos]

Is there any difference between the two? which works best