same.
They both have wrong cases and casebacks and inaccurate markings.
SF fixed those issues in v2. They refined dial too.
If iI remember correctly some of early SF v1 came with plexi instead of sapphire.
[mention]Hazing [/mention]the fake regulator near the balance wheel is the same in all SF versions (that I’m aware of), and on the ZF they’re different.
Here are both my SF 606 and ZF 448 for your reference. Cheers!