Hows this different from SeedsPlease Lite Redux?

This mod is an adjustment of OwlChemist's Seed Please: Lite 1.4 version. The changes made are mentioned in the description for this mod. For the most part, this version is faithful to OwlChemist's version. The only changes I made are the QoL ones that are mentioned in the description.

s the common issues fixed?

First I have not heard about any issues TBH. But let me take a stab at it:

Mushroom seeds - I assume here that you are talking about conflicting mushrooms from different mods. The likelihood is that those mods conflict with each other coz the defNames they use are the same. OC's auto-generator of modded seeds is based on their defname IIRC, so if there's an issue there, it lies with those mods.

Seed generated after stockpile zone assign list generated - Not entirely sure what you are stating here, but any mods that add new plants should have seeds generated. Any pre-existing stockpiles will also have those seeds inserted into their stock options - but they will not be automatically checked.

This is standard vanilla behaviour. If one decided to add any new items into an existing save, they will have to manually add those new items to existing stockpiles - or simply clear them and reset their assigned tag groups.

The same "issue" applies to bill for production, it's not something any mod can "fix"

VV - New Harvest - I looked into this mod, since you mentioned it in your post on that other mod. There does not appear ot be any issue with this mod. This is merely the same vanilla limitation mentioned above that can easily be corrected by simply clearing the stockpile, and resetting it.

The new seeds are there, they are just default unchecked.