Isola 370HR vs Megtron6_R-5775 ??? (PCB Material Selection)

[luudee]

Hello,

we have designed a PCB using Megtron6_R-5775. We have some PCIe 3.0 and DDR4 (2100) signals.


To reduce cost, we are considering switching to Isola 370HR.
(Yeah I understand that all impedance calculations have to be redone, etc ...).


Has anybody used both materials and can offer some advice ?

Will Isola 370HR be as good as Megtron6_R-5775 ?

Are we being silly ?

Anything we should watch out for ?


Many Thanks,
rudi