In reply to Climber_Bill:
Without two to compare side by side, as I recall the sole of the new one has a sort of scoop under the forefoot. The shape is also different to some extent, which is the major issue for me as the shoe now gapes at the instep, making a nice receptacle for stones and grit - and a complete non-starter.
Other obvious changes, like the colour of the heel rubber, may just be cosmetic, but after years of wearing the same shoe I've still found nothing better for me (edge-centric climbing style, trad, e2-ish these days)