The Neo takes a different heatbreak, if that is what you are referring to. I’ve been told this works: https://www.amazon.com/dp/B09BB99MC7/?coliid=I3NBCP7CRY9ANE&colid=1AKXX8D4GWOAG&psc=1&ref_=lv_ov_lig_dp_ii
I use this one and it works pretty well. Retraction distance needs to be adjusted or else you'll get clogs due to it cooling too effectively. I set mine around 1mm +/- but don't go any higher than 1.5mm. Speeds are standard in 35-50+mm/s for retract speed too.
https://www.amazon.com/gp/product/B09BB99MC7
and since you're asking about other plug n play upgrades, I highly highly highly recommend the Micro Swiss dual-geared extruder. It's leagues better than anything else out there, even the full metal extruders. I haven't had slipped filament since buying it.
I plan on upgrading to the Micro Swiss hot end at some point as well as that's a drop in replacement (in theory) but it narrows the heatsink enough that I think the minimus hot end system would fit again (he cancelled the Neo specific version due to lack of space)
Wow that's really cheap. Mine's been fairly reliable so far. If only the anycubic vyper could use this as well, they have a failing ABL probe.
Often I see them for around $30-36. I may try to mod this onto an ender 3 if I can find the ribbon cable for it.
Have you seen this part? Looks really interesting considering it' made specifically for the CR6.
Edit: the bimetal heatbreak looks to be 6mm outer diameter. I would measure the stock one first to make sure this fits.