1/4 inch double flutted rough cut bits

I have two bits. One is an up cut the other a down cut. The up cut is getting dull and would like to switch to the other. Other than the obvious what is the difference. Can I run them at the same speeds. I typically cut soft pine with a few small nots. I typically have been running at 50/20. Have not had any issues. Can I switch to the down cut and till run at these speeds

I think the best idea is just to test. Lower the speed just after starting the Carve and start increasing it on the fly, the chip size, machine vibration and sound will answer you. Plus default speeds in Easel are quite conservative, so anything will probably work kinda ok.