Panachee will very, very occasionally have a fig with no stripes. It may be one of the millions of combinations of stripes that are possible, as it looks like no two Panachee figs have exactly the same pattern. Though I have so far not seen a stripeless fig that was all light colored (yellowish), only dark colored (greenish).
Striped wood should continue to produce striped figs. Wood that has "reverted" to unstriped, with solid green figs has never gone back to being striped, in my experience.
The figs are as identical in performance and flavor as is possible. The Reverse (reverted Panachee) seems to ripen a bit earlier in hotter summers, and more concurrently in cooler summers, but not to an extent that really changes its season.