The Unidens will have a couple other features not on the GRE (correct me if im wrong - as I often am).
IF Exchange – lets the scanner use an alternate IF (intermediate frequency) to help avoid interference sources.
**Encryption SKIP** - Unidens will skip by Encrypted transmissions / resume scanning (I believe Motorola P25 only).
Priority ID Scan -- lets the scanner apply priority to channels as they become active on the system
Preemptive Priority (Motorola only) – monitors for priority traffic, even when the scanner is receiving a transmission on the system
Location-Based Scanning – when a compatible GPS unit is connected, turns on and off systems, sites, and channel groups as the location changes
Band Scope – gives a rapid graphical display of the strength of signals within a specified range of frequencies
Key Safe Mode -- prevents naïve users from accidentally changing programming … a feature that has been a big request from public safety and media radio system managers
Fire Tone-Out Tone Search – identifies tones used by agencies using two-tone paging for alert signaling
Volume Offset – lets individual channels be programmed with a volume offset to help balance between channels that are louder or softer than other programmed channels
Multicolor Display Backlight – allows the selection of backlight color to meet the user’s own aesthetic taste
Visual Alert Notification – lets alerts be assigned to specific display colors (backlight not just an LED at the top), flash patterns, audible tones, and volume levels.
Form Factor - the 396XT will still be about half the size of the GRE, while retaining a comparable screen size.
Not everyone will use those features but just saying... GRE can think about implementing those in their next radio.
To my thinking, the only major thing that the new Uniden seems to offer over the 500/600 would be P25 simplex talkgroups.
73/Allen (N4JRI)