We put a side by side test by comparing the file download speed between DR650S-2CH and the new DR750S-2CH. The setting for both models had been set to the HIGHEST Video Quality which recorded the video clip with the biggest file size.
Even though the file size from DR750S-2CH is ~ 17% bigger than DR650S-2CH, the WiFi transfer speed for DR750S-2CH is more than 3 times faster than DR650S-2CH. Thanks to the new faster processor used in the new DR750S series.
Find out more what DR750S-2CH does better from this link.