Question about Sony Cyber-Shot DSC-HX99

Micro-SD: I suspect that the micro-SD cards listed by Digitec as accessories are only conditionally compatible. They have a maximum write rate of only 90 Mbps, but the camera supports bit rates of 100 Mbps. The micro SD cards with the Roman 1 can only do 90Mbps and have the "usual" contacts on the back. The faster micro SD cards have a roman 2 on the front and another row of contacts on the back, which then also have over 100Mbps write rates. The camera also works with the "slower" cards, but only with the lower bit rate when filming. Can anyone confirm this? Thank you.