As far as looks go, I don't really like the lemony burst. I like it lighter at the edges and a tad bit warmer in the center. That would be purely a personal thing though.
Is there maple under the black like a Gibson Les Paul Standard, or is it just solid mahogany? Could make a bit a difference in tone if you want the traditional LP sound.
The electronics are fancier on the Pro, but likely still sub-par and if they are going to be replaced soon, not really worth paying extra for. I would say if you like the way the black one looks, use the Â£80.00 difference towards upgrading the electronics.
What does it mean on the Plus Top Pro that the neck is "Hand Set Mahogany"
I think all set necks are glued in by hand. One of the few processes that would be tough to automate.
I believe it really comes down to a matter of which one you think looks better, otherwise they are similar. Of course playing each of them could make a big difference in which to go with.