What is better for sparkplugs, inconel super alloy or iridium?

There are two significant design differences between these plugs.

One: The Pulstar plug has a much wider center electrode than a typical iridium plug. A thinner electrode allows better spark plasma to fuel mixture exposure. This results in faster ignition and less misfire.

Second is metalurgy; Iridium melts at over 4000 deg F while Inconel melts at around 2500 deg F. The higher melting point of Iridium allows the finer wire electrode which in turn results in the benefits to ignition noted above.

I've been using dg1h10 pulstar plasmacore over two years now on my Infiniti FX35 with 206000 mile on it and don't have any problems,I've experienced more power on my engine and best gas consumption, for what I experienced I surely recommend these plugs

Inconel , AKA nichrome and a few other very similar alloys, are what plugs have always been made of ( at least since the 50's). I have removed 16 manufacturers original platinum plugs with 100,000 miles . All looked perfect , I hated to throw them away . New replacement platinum plugs made no difference in performance or mileage. I don't know why one would need better than 100,000 miles of excellent performance.