Strangely enough I don’t see any difference whatsoever. Both are fast. What versions of the libraries are you using?
$ pip freeze | ag '(holoviews|geoviews|zarr|netcdf|xarray|rasterio|datashader)' | sort
datashader==0.15.2
geoviews==1.10.1
h5netcdf==1.2.0
holoviews==1.17.1
netCDF4==1.6.4
rasterio==1.3.8
rioxarray==0.15.0
xarray==2023.9.0
zarr==2.16.1