Transition from Harmattan to Leste
 

I have started to utilize Leste on the N900 with some handy applications. One example: MPD + MPC + Command execution widgets = decent audio player. I've been wondering now a couple times, which of the Maemo 5 structures also apply to Leste - generally speaking. What about the wiki-articles? (e.g. https://wiki.maemo.org/Application_Menu or https://wiki.maemo.org/LED_patterns) Or in other words - what's different under the hood?