Both of them have HD out and you can connect them direct to HDTV sets. HDC-SD1 can record on SDHC Memory Cards. With 4GB SDHC Memory Card can provide 1 hour of recordings in High Definition. HDC-DX1 is capable to record to DVD-RAM, DVD-RW, DVD-R and DVD-R Dual Layer.
Both of the are equipped with the same kind of 3CCD sensor system featured in professional video cameras and they have Optical Image Stabilizer with 12x optical zoom. For better sound experience Panasonic made 5-microphone, able to capture sound for 5.1-channel surround sound system.