I am not sure what you mean by that.
The future of the RedbearDuo is uncertain with Redbear Labs ending support in 2019 (since you use 2019 in your post); but with no firm commitment from Particle what they intend to do with it.
The Photon (is that the 'photo' from your post?) is WiFi, not cellular. The Photon is being continued and is not affected by the introduction of Mesh; I need to search for that announcement.
The Electron is the one that comes in 2G and 3G versions. The Electron is being continued as far as I know. Depending on where you live, 3G may still be the latest and greatest option per this post:
The newer E-Series also provides more cellular modem options compared to the Electron.