The Woods vs Vaughan conundrum in terms of signing an experienced prop is actually quite difficult, they're very similar players. Vaughan makes more metres & tackles at a higher efficiency, in fewer minutes, but Woods has the advantage of being a capable & willing offloader.
Vaughan (30) - 15 games, 49.9 minutes per game, 13.6 average hit-ups, 136 averaging running metres, 0.2 offloads per game, 31.5 tackles per game @ 98% efficiency.
Woods (30) - 14 games, 53.1 minutes per game, 11.9 average hit-ups, 121 averaging running metres, 0.9 offloads per game, 27.4 tackles per game @ 94% efficiency.
I'd marginally lean towards Vaughan based on the numbers.