2.2000s not as much but be better in detail clarity imaging (result of newer 2000 driver) and maybe tonality top to bottom in a suitable smaller room.
These are two different size and generation models, apples and oranges as OHMs go, so anything is possible.
I had original Walsh 2s from 1981-1998. I kept them initially to compare side by side to the Walsh 2 series 3 models I acquired back then (and am still using). I was looking for new large speakers at the time for my largest listening room and after a lot of listening and investigation of options I decided to give OHM a chance
This was an apples/apples comparison in regards to speaker size and output capability. The newer series 3 drivers were superior in every way.
I traded in the original Walsh 2s towards my larger F5 series 3 models that I also still use in my main setup. The Walsh2 series 3 were so good for what I payed I ended up keeping them around as well.