There is not any tutorial to help you with that I think.
To make it clear I just removed TDE from download - it's too old, but still can be downloaded from sourceforge server.
Other Sparky dev spins will probably join the official releases when they will be stable.
There is one more to come to test : Lumina desktop.
Anyway LXQt is lightweigh and fast and should replace LXDE, but not now yet.
Budgie desktop is nice and simply and use GNOME stack.
Both of them are still under development and shouldn't be used for regular usage.
It's difficult to make personal comparsion, the best way to find out about strong and weak point is to check it out yourself and compare it to independent tests made by community.