Pancake Nema 17 stepper recommendations.

Thinking about swapping the regular extruder stepper on my Ender 5 for a lighter pancake one. Anyone have any recommendations for particular make/model?

Also, I see there are at least 2 angle varieties: 1.8 degree (200 steps/rev) and 0.9 degree (400 steps/rev). I presume it matters, but I’m also wondering how do I tell what my existing one is and, if I got the 0.9 variety, could I make an adjustment in the firmware to compensate, and would the extra steps/mm actually be of any benefit?