It's similar to the previous one but with 2 SIM slots.
It's a relatively low-level phone, but extremely nice to use. I have the previous version, and because it runs native Linux, hardware doesn't matter as much as with Android. It can run Android apps.
There is only 1000 devices for developers, and it ships only to Europe, but it's nice to see the story continues. There still is a European OS, a Free OS, a Finnish phone manufacturer. Good luck, Jolla!
Specs
Display
5.0″ IPS, 293 PPI HD (720*1280)
Battery
2500 mAh li-on User-replaceable battery
Memory
16 GB storage, 2 GB RAM, MicroSD slot up to 32 GB
Camera
8 megapixel AF camera with LED flash, 2 megapixel front-facing camera
Connectivity
2G/GSM: 2/3/5/8 | 3G/WCDMA: B1. B5, B8 | 4G/LTE: 1/3/7/20
Processor
1.3 GHz quad-core Qualcomm Snapdragon™ 212