@henk
The startup could be slower because of the way Strawberry initializes objects earlier at startup, I fixed bugs and even rewrote many parts of the code where Clementine did things unsafe thread-wise, ie.: reading and modifying GUI things from a another thread than the main thread, which will be faster, but it's broken code, and just a coincidence that it doesn't crash.
One thing you can try is to turn off "Grey out unavailable songs in playlist on startup" in Settings / Playlist, this feature will lag the startup significantly.
Strawberry has a little delay at the beginning of the scan, it's because it iterates through the directories to find the number of files for the progress % status.
Clementine calculates the progress only based on the number of directories, which makes the progress inaccurate, and often stuck on 97-99% for a long time.
Other than that, then scan speed should be pretty much identical.