What's the difference between the TP08 and TP20?

The difference between the TP08 and TP20 are the preset meat options.

The TP08 is more designed for smoking/barbequing foods. You can manually set both high and low temperature alarms and does not come with preset meat options.

The TP20 also comes with high and low temperature alarms but has the option to do both manual temperature settings and using preset meat options.