Comparison of 4 different CNC endmill router bits

The chip out of some CNC router bits was annoying, so i ordered some different types and made this test.

The candidates:
1.) straight cut router bit
2.) up cut router bit
3.) down cut router bit
4.) up/down cut router bit

Like standard router bits for handheld machines, the straight cut type seems to work great on my CNC.

All four router bits are from aliexpress-Seller "CNC Cheap Store":

straight cut:
https://de.aliexpress.com/item/5pcs-4...

down cut:
https://de.aliexpress.com/item/5pcs-3...

up-/down cut:
https://de.aliexpress.com/item/2pcs-U...

upcut:
https://de.aliexpress.com/item/Free-S...