Yamaha DTX differences

[jmquek]

Hi Peeps..
was trying to find more infos online for comparison between DTX 720k VS DTX 750k but to no avail

Not sure how yamaha line the DTX 700 series, but apparently DTX 750k is way older than DTx 720k?

What's the differences?
is the module totally same?

thanks in advance for the feedback!