PB 301+ has 14.2, should I go to 15.1/15.2?

[kacir]

Originally Posted by Vienna01

Is there a 15.3 beta for 301? If so, does it have new capabilities or just improved stability features?

I haven't noticed any new features

Originally Posted by Vienna01

When I searched on "15.3" or "firmware +"15.3" in the Pocketbook sub-forum, I did not get any results. I guess that I encountered a limitation of the tool - or maybe there hasn't been and postings using that term.

There is also German PocketBook forum.
Some people reported that the archive with 15.3 for 301 was broken, have a look if it was reuploaded

Originally Posted by Vienna01

I have read that the 301 is more popular [than 360] in what is sometimes called "eastern Europe". Maybe the topic has been discussed in Russian or Ukrainian somewhere.

This is THE place to discuss PocketBook
http://www.the-ebook.org/forum/
This is where the design of PocketBook 360 was crowdsourced.