Nobody should have to choose between Dodonpachi Resurrection and Espgaluda II...so do yourself a favor and get 'em both! (And buy one for a friend while you're at it!)
I missed release sale opportunity for Dodon because I get confused between the different hours per country. I'll pick it that's sure but when I tried the demo yesterday it's been quite a disappointment and I replayed a little Espgaluda II to verify. For my eyes Dodon go over a limit when Espgaluda stays within. Dodon look like a confuse garbage when Espgaluda II is very clear despite all the stuff. I suppose it is coming from fire shots a lot more obtrusive and "bonus" look don't working well for me. I'd say pick Espgaluda II first and only then Dodonpachi.
I personally prefer Dodonpachi over Espgaluda. Espgaluda is easier to start with, but harder to achieve super high scores. Dodonpachi has a lot more going on, and can be quite confusing at first, because of the separate weapon systems: bullets and lasers. Dodonpachi is just more intense. Definitely worth getting though, if you're a fan of shmups and bullet-hell.
Anyone realises that 'all proceeds go to the earthquake relief effort in Japan' only applies for Mushihimesama Bug Panic?