I have spent many miles on V-Rods, Night Rods, and Muscles. I traded my Super Glide in on my Thunderbird. The V-Rod has the edge on all-out full throttle power. That's it. The Thunderbird is built better, rides better, handles better, and stops better than any Harley, period.
It's just a better bike. Riding my brother's Dyna now, it feels like a old, slow bike with bad brakes. He rode the Thunderbird. His Dyna is now for sale.