2 download types of BioMegatron345muncased and download issue

Hi,

I noticed there are two versions of BioMegatron345muncased:

The nemo version has just a .nemo file and the other has 3 files. Is the latter version outdated?

Here is another issue that is confusing me. When I download the nemo version on my linux I just see a single nemo file after unzipping. But when I download that same nemo version by web on my macbook using Chrome and then unzip it I see 4 files (2 vocab.txt files, a .ckpt and yaml file). Why does this happen? Actually I prefer the .pt format and not nemo but just wondering the reason and what to be aware of.

Thank you,
-Richard