Yes. Like most OEMs, I'm sure they use a supplier.
With Synesso, I'd bet they put quality first and require tighter tolerances on their components. With large volume operations (like Rancilio, Gaggia, etc), I would bet cost reduction (profitability) comes first and tolerances on form and hole pattern would be similarly relaxed. Could be they change suppliers several times over the years to get the best price.
For example, look at your 21g basket. The holes are not even centered. What's the requirement on the drawing here? Whatever it is, it doesn't look like this basket should pass any kind of quality inspection.
The LM/Synesso ridgeless double basket I received was definitely an improvement over the original stock Rancilio basket. Like Mark Prince said, everything about them from material to hole shape was better. Did you try them back-to-back on a Silvia or are you speaking more generally?
Just for fun (since we're showing photos), here's another basket found stock on a high priced machine (not a Rancilio). Ahhh yes....quality is job #1.

Not all baskets are created equal.