Yes there will be cross tolerance, they have similar mechanisms of action.
I'm not sure by how much, me dosing 20mg 2ce at a festival caused my acid trip the next day to be severely dulled.
And the tabs were good, I got them from a trusted friend who said that everyone he gave them to had great powerful experiences, and I could feel that the 2 tabs should have been a great trip but the 2ce played a role.
IDK when you have a tolerance to psyches and you take another you can sort of feel how high you should be even though you aren't, idk