The zamac head being slightly thicker will make the shaving angle a bit steeper so I would agree with that.The Brass one is pretty much the same head as my Post War Ball End Tech and it's one of my favourite razors.
The Zamak one is a good razor but the shave is a touch less smooth than the Ball End Tech.
Yep, one is a nice post-war "oval hole" brass Tech, the other is a zamak crapper. I prefer the pre-war "triangle slot" brass Tech.
Techs came with brass, aluminum, zamak, Bakelite, plastic, and who knows what parts over the years, if you grab any two from the bay or elsewhere, the chances of them being the same are slim. But they all shave amazingly well. Enjoy my friend.
The zamac head being slightly thicker will make the shaving angle a bit steeper so I would agree with that.
I only have a couple of English made flat bottom techs.
The earliest of the "Gillette" stamped heads had a slightly different font. My '65 and '66 Traveller are of that type and my '70 is of the newer font. Looking at Mr Razor, I think '67 brought in the new font.I think the later zamak ones shave a tad smoother oft times than the post-war BE Tech. Strange, no? I have also stated that if someone would duplicate exactly the modern zamak Super Gillette Blue/Sterling razor in stainless or brass that it would be perfection. Added durability & weight with a more nimble design. I can surmise this as I own a first year zamak head Travel Tech with a brass baseplate. I think it was only for one year, '63 or '64, and it shaves like a dream.
I am genuinely amazed of how much knowledge you guys have. Thank you so much for sharing.