I think from looking at what people have been saying that the Dingoo maybe the easier one for use to program into as you can just but the flash file onto a SD card and it will appear without problems

Technology

Gemie vs Dingoo

Gemie
400x240- 3"
SDHC card slot (32GB)
USB
800 mAH battery
can play swf with flash 7
$82 which is about €60

Dingoo
320x240 - 2.8"- 24 bit colour
SDHC card  slot (8GB)
USD (charging only)
rechargable battery
DVD quality
plays flash
$80 about €60

A view links
http://en.wikipedia.org/wiki/Dingoo_A320
http://www.dcemu.co.uk/vbulletin/showthread.php?t=199276
http://milynkee.com/