gold Daytona 16518 help?

[Patekpete]

Hi

I already have a SS Zenith Daytona but want a gold watch and am considering a gold Daytona with zenith movement 16518.

I've only seen pics at the net and wanted your opinions gents.

Why is the premium vs the SS model so low. This valuation differential is also enticing me.

How collectible is this watch?

If I wanted a gold watch should I look elsewhere?

My other option is a gold GMT Master II which comes with a gold bracelet too. I'm just worried the Au bracelet might seem too loud. The Daytona seems more understated with the leather strap.

I've never had a gold watch. The only one I own is a white gold nautilus 5712G.

Thanks!