I can definitely live without those features, just need something that is predominantly a navigation device. Thanks for your input.
I'd suggest to anyone considering a gps device to have a good think about what they want and how they intend to use it.
For example, you say Navigation, I immediately start thinking about:
Will I need the device to create routes or get me back on course?
If I do need it to create routes is that to an address/postcode?
What will I use to create routes such as cycle.travel, RWGPS, Strava etc?
Is my unit compatible with those?
Do I need Turn by Turn directions?
Will I need detailed maps?
Where will I use it? If I go abroad do I need new maps? Are they free? Easy to get?
Screen quality/display.
Then other general things to consider would be battery life, compatibility with charging on the go (powerbank/dynohub?), cabling, support.
Bike gps units are not the same as for cars. On a bike we "feel" a route far more than in a car so the quality of a route can be subjective. Very subjective. On unit route creation or re-routing can be variable because most units do not have the processing capability.
If you're not familiar with the world of bike gps units, you could do worse than try Osmand on your phone. A bit clunky to get a hang of, but a real good introduction to the world of gps. Figure out what's important for you, then pull the trigger on a dedicated unit with confidence.
Good luck!
FWIW, I'm not familiar with either of the units you mentioned.