Of the recommended led strips by the github (WS2811, WS2812B, SK6812, APA102) I’ve used WS2812B and APA102 but only with logic level converters (although some use it without, I’ve seen some strange artifacts sometimes that the converter eliminated).
WS2815 (upgraded version running on 12 V) should also work and even better as a long, high density led strip at 5V would need additional powering, otherwise the voltage drop would bring unwanted levels of brightness (likely this won’t be a problem at 12 V).
Not that I’ve know of (I’ve seen ESP8266 based controllers but for analog led strips); however, I didn’t specifically searched for digital led strips + ESP boards as I’ve done most of the projects myself.
If thinking that soldering would be a problem, then it should be of no concern (you can connect led strip to ESP using du Pont connectors, without any soldering whatsoever). You might need to look for a case for the ESP, however this is mostly dependent on one’s creativity.
I assume the question is about whether the two projects can be flashed similarly to blank or to pre-flashed ESP boards (Tasmota can, in fact, be flashed over all sorts of devices mostly featuring ESP8266, support for ESP32 is not yet at the same level) and not about software differences, on which I cannot comment. You can also find Youtube videos explaining the flashing process of different software projects and boards.