SM-T800 (Galaxy Tab S 2014) Which lineageos version to choose?

Hi, my tablet is kinda slow. I thought about getting rid of the original bloatware. I see that there are inofficial versions like https://forum.xda-developers.com/t/rom-unofficial-13-lineageos-20-for-samsung-galaxy-tab-s-10-5-sm-t805-sm-t800-chagalllte-chagallwifi-alpha.4577223/page-10

I was wondering if a newer android version makes things even slower than now. Should I stick with the last official version or go for an unofficial one, when it comes to speed?