Not that the Dell Venue Pro is anything new, it's Dell's first Windows Phone 7 smartphone which was announced back in October, but the Dell Venue with Android is somewhat new. And the Global Certification Forum (GCF) has just approved both devices. There's no real difference between both, both feature quadband GSM/GPRS/EDGE as well as triband UMTS/HSDPA at 900/1700/2100 MHz. However, it's quite interesting tha thet GCF isn't mentioning HSUPA while Dell said that both, the Dell Venue and the Dell Venue Pro are featuring HSDPA at 7.6 Mbps as well as HSUPA at 5.76 Mbps. Normally you should think that the GCF knows which features are supported since it's testing these features. But Dell should know it better anyway.
As said, the only mentioned difference between the Dell Venue and the Dell Venue Pro, other than the mobile OS and that the Dell Venue isn't sporting a slide-out keyboard, is that the Venue is supporting Open Mobile Alliance's SUPL standard, which stands for "Secure User Plane Location", an IP protocol for assisted GPS (aGPS).
Cheers ~ Arne