I have had a 686 onyx for well over 10 years. Last fall it choked on ND dust and needed a lube and oil change, but that was all. It has been used a bunch for all sorts of birds and fits me better than others... I have a bunch of O/Us and it is one of my favorite three with an old BL-4 and a 101. In the same time frame I have had or have examples of most other brands and they mostly left.
No idea what the X-tra wood" means exactly as it was not an option when I was searching. Wood on Berettas in general is much plainer than Citoris at the same price point.
art