so in your experience, which one is faster and more stable during topspin rallies?no, completely different.
also, speed difference.
I mean, these are two completely different blades … different feel, different speed. HAL is also quite picky in regards to rubbers - in my experience it works well only with 50+ ESN hardness rubbers. FZD/Viscaria (same blade, handle is different) works well with wider range of rubbers (I tried 45 to Dignics09c and it played well throughout). HAL became super trampolinish with softer rubber.