I think they both shoot very nicely indeed, and they both feel good in the hands. However, two factors would swing it for me...
1 Re-sales. The Geo will hold it's price well, whereas the DM will drop like a stone if it follows the pattern of previous DMs
2 Aftersales. Planet RULE in after sales. Based in the UK, very helpful and all round excellent. Not had to use DYEs aftersales, but when I went to Campaign last year, PE had a big etch tent, lots of product on display and you could walk up and they'd take a look at your marker straight off the bat. Dye had a tent with no product on display and no one out front to talk to, and seemed just to be dealing with their sponsored teams...