Dogwood is still supported by ongoing software updates. You just need to remember to set the right revision if you ever reflash again; other than that, you get the same software as everyone else.
Compared to Evergreen, on Dogwood you get a smaller battery, dimmer flashlight and RGB LED, elevated power consumption and a small chance of rare random lockups due to a hardware bug (which becomes a high chance of frequent lockups on images made for other revisions that don’t contain the workaround). It may also have troubles with acquiring a GPS fix.
On the plus side, the phone’s a bit shorter and lighter 
Its screen is a bit brighter too IIRC.