Hi Antonio,
Your eye is, as always, very keen. No
niku in the sense you'd find it on a Japanese sword, but it is quite "meaty". Also, it has been given a thick, "apple-seed" edge, which may be what you're noticing. It's easily the best cutting sword I've ever handled.
Most dha have a wedge-shaped blade cross-section. Some are very thin and light, and some are more than 1/4" (>1cm) at the spine. Spines are often flat, but many will be peaked to greater or lesser degree (but not, in my experience, anything approaching the ridge-line on a Japanese sword).
So many different blade shapes and forms appear on dha that you really can't go "wrong". Please keep me posted on the progress of this project. I'm excited to see where you take it.
Best,
Andrew